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<?php
2
 
3
declare(strict_types=1);
4
/**
5
 * SimplePie
6
 *
7
 * A PHP-Based RSS and Atom Feed Framework.
8
 * Takes the hard work out of managing a complete RSS/Atom solution.
9
 *
10
 * Copyright (c) 2004-2022, Ryan Parman, Sam Sneddon, Ryan McCue, and contributors
11
 * All rights reserved.
12
 *
13
 * Redistribution and use in source and binary forms, with or without modification, are
14
 * permitted provided that the following conditions are met:
15
 *
16
 * 	* Redistributions of source code must retain the above copyright notice, this list of
17
 * 	  conditions and the following disclaimer.
18
 *
19
 * 	* Redistributions in binary form must reproduce the above copyright notice, this list
20
 * 	  of conditions and the following disclaimer in the documentation and/or other materials
21
 * 	  provided with the distribution.
22
 *
23
 * 	* Neither the name of the SimplePie Team nor the names of its contributors may be used
24
 * 	  to endorse or promote products derived from this software without specific prior
25
 * 	  written permission.
26
 *
27
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
28
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
29
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS
30
 * AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
32
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
34
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35
 * POSSIBILITY OF SUCH DAMAGE.
36
 *
37
 * @package SimplePie
38
 * @copyright 2004-2016 Ryan Parman, Sam Sneddon, Ryan McCue
39
 * @author Ryan Parman
40
 * @author Sam Sneddon
41
 * @author Ryan McCue
42
 * @link http://simplepie.org/ SimplePie
43
 * @license http://www.opensource.org/licenses/bsd-license.php BSD License
44
 */
45
 
46
namespace SimplePie;
47
 
48
use InvalidArgumentException;
49
use Psr\SimpleCache\CacheInterface;
50
use SimplePie\Cache\Base;
51
use SimplePie\Cache\BaseDataCache;
52
use SimplePie\Cache\CallableNameFilter;
53
use SimplePie\Cache\DataCache;
54
use SimplePie\Cache\NameFilter;
55
use SimplePie\Cache\Psr16;
56
use SimplePie\Content\Type\Sniffer;
57
 
58
/**
59
 * SimplePie
60
 *
61
 * @package SimplePie
62
 * @subpackage API
63
 */
64
class SimplePie
65
{
66
    /**
67
     * SimplePie Name
68
     */
69
    public const NAME = 'SimplePie';
70
 
71
    /**
72
     * SimplePie Version
73
     */
74
    public const VERSION = '1.8.0';
75
 
76
    /**
77
     * SimplePie Website URL
78
     */
79
    public const URL = 'http://simplepie.org';
80
 
81
    /**
82
     * SimplePie Linkback
83
     */
84
    public const LINKBACK = '<a href="' . self::URL . '" title="' . self::NAME . ' ' . self::VERSION . '">' . self::NAME . '</a>';
85
 
86
    /**
87
     * No Autodiscovery
88
     * @see SimplePie::set_autodiscovery_level()
89
     */
90
    public const LOCATOR_NONE = 0;
91
 
92
    /**
93
     * Feed Link Element Autodiscovery
94
     * @see SimplePie::set_autodiscovery_level()
95
     */
96
    public const LOCATOR_AUTODISCOVERY = 1;
97
 
98
    /**
99
     * Local Feed Extension Autodiscovery
100
     * @see SimplePie::set_autodiscovery_level()
101
     */
102
    public const LOCATOR_LOCAL_EXTENSION = 2;
103
 
104
    /**
105
     * Local Feed Body Autodiscovery
106
     * @see SimplePie::set_autodiscovery_level()
107
     */
108
    public const LOCATOR_LOCAL_BODY = 4;
109
 
110
    /**
111
     * Remote Feed Extension Autodiscovery
112
     * @see SimplePie::set_autodiscovery_level()
113
     */
114
    public const LOCATOR_REMOTE_EXTENSION = 8;
115
 
116
    /**
117
     * Remote Feed Body Autodiscovery
118
     * @see SimplePie::set_autodiscovery_level()
119
     */
120
    public const LOCATOR_REMOTE_BODY = 16;
121
 
122
    /**
123
     * All Feed Autodiscovery
124
     * @see SimplePie::set_autodiscovery_level()
125
     */
126
    public const LOCATOR_ALL = 31;
127
 
128
    /**
129
     * No known feed type
130
     */
131
    public const TYPE_NONE = 0;
132
 
133
    /**
134
     * RSS 0.90
135
     */
136
    public const TYPE_RSS_090 = 1;
137
 
138
    /**
139
     * RSS 0.91 (Netscape)
140
     */
141
    public const TYPE_RSS_091_NETSCAPE = 2;
142
 
143
    /**
144
     * RSS 0.91 (Userland)
145
     */
146
    public const TYPE_RSS_091_USERLAND = 4;
147
 
148
    /**
149
     * RSS 0.91 (both Netscape and Userland)
150
     */
151
    public const TYPE_RSS_091 = 6;
152
 
153
    /**
154
     * RSS 0.92
155
     */
156
    public const TYPE_RSS_092 = 8;
157
 
158
    /**
159
     * RSS 0.93
160
     */
161
    public const TYPE_RSS_093 = 16;
162
 
163
    /**
164
     * RSS 0.94
165
     */
166
    public const TYPE_RSS_094 = 32;
167
 
168
    /**
169
     * RSS 1.0
170
     */
171
    public const TYPE_RSS_10 = 64;
172
 
173
    /**
174
     * RSS 2.0
175
     */
176
    public const TYPE_RSS_20 = 128;
177
 
178
    /**
179
     * RDF-based RSS
180
     */
181
    public const TYPE_RSS_RDF = 65;
182
 
183
    /**
184
     * Non-RDF-based RSS (truly intended as syndication format)
185
     */
186
    public const TYPE_RSS_SYNDICATION = 190;
187
 
188
    /**
189
     * All RSS
190
     */
191
    public const TYPE_RSS_ALL = 255;
192
 
193
    /**
194
     * Atom 0.3
195
     */
196
    public const TYPE_ATOM_03 = 256;
197
 
198
    /**
199
     * Atom 1.0
200
     */
201
    public const TYPE_ATOM_10 = 512;
202
 
203
    /**
204
     * All Atom
205
     */
206
    public const TYPE_ATOM_ALL = 768;
207
 
208
    /**
209
     * All feed types
210
     */
211
    public const TYPE_ALL = 1023;
212
 
213
    /**
214
     * No construct
215
     */
216
    public const CONSTRUCT_NONE = 0;
217
 
218
    /**
219
     * Text construct
220
     */
221
    public const CONSTRUCT_TEXT = 1;
222
 
223
    /**
224
     * HTML construct
225
     */
226
    public const CONSTRUCT_HTML = 2;
227
 
228
    /**
229
     * XHTML construct
230
     */
231
    public const CONSTRUCT_XHTML = 4;
232
 
233
    /**
234
     * base64-encoded construct
235
     */
236
    public const CONSTRUCT_BASE64 = 8;
237
 
238
    /**
239
     * IRI construct
240
     */
241
    public const CONSTRUCT_IRI = 16;
242
 
243
    /**
244
     * A construct that might be HTML
245
     */
246
    public const CONSTRUCT_MAYBE_HTML = 32;
247
 
248
    /**
249
     * All constructs
250
     */
251
    public const CONSTRUCT_ALL = 63;
252
 
253
    /**
254
     * Don't change case
255
     */
256
    public const SAME_CASE = 1;
257
 
258
    /**
259
     * Change to lowercase
260
     */
261
    public const LOWERCASE = 2;
262
 
263
    /**
264
     * Change to uppercase
265
     */
266
    public const UPPERCASE = 4;
267
 
268
    /**
269
     * PCRE for HTML attributes
270
     */
271
    public const PCRE_HTML_ATTRIBUTE = '((?:[\x09\x0A\x0B\x0C\x0D\x20]+[^\x09\x0A\x0B\x0C\x0D\x20\x2F\x3E][^\x09\x0A\x0B\x0C\x0D\x20\x2F\x3D\x3E]*(?:[\x09\x0A\x0B\x0C\x0D\x20]*=[\x09\x0A\x0B\x0C\x0D\x20]*(?:"(?:[^"]*)"|\'(?:[^\']*)\'|(?:[^\x09\x0A\x0B\x0C\x0D\x20\x22\x27\x3E][^\x09\x0A\x0B\x0C\x0D\x20\x3E]*)?))?)*)[\x09\x0A\x0B\x0C\x0D\x20]*';
272
 
273
    /**
274
     * PCRE for XML attributes
275
     */
276
    public const PCRE_XML_ATTRIBUTE = '((?:\s+(?:(?:[^\s:]+:)?[^\s:]+)\s*=\s*(?:"(?:[^"]*)"|\'(?:[^\']*)\'))*)\s*';
277
 
278
    /**
279
     * XML Namespace
280
     */
281
    public const NAMESPACE_XML = 'http://www.w3.org/XML/1998/namespace';
282
 
283
    /**
284
     * Atom 1.0 Namespace
285
     */
286
    public const NAMESPACE_ATOM_10 = 'http://www.w3.org/2005/Atom';
287
 
288
    /**
289
     * Atom 0.3 Namespace
290
     */
291
    public const NAMESPACE_ATOM_03 = 'http://purl.org/atom/ns#';
292
 
293
    /**
294
     * RDF Namespace
295
     */
296
    public const NAMESPACE_RDF = 'http://www.w3.org/1999/02/22-rdf-syntax-ns#';
297
 
298
    /**
299
     * RSS 0.90 Namespace
300
     */
301
    public const NAMESPACE_RSS_090 = 'http://my.netscape.com/rdf/simple/0.9/';
302
 
303
    /**
304
     * RSS 1.0 Namespace
305
     */
306
    public const NAMESPACE_RSS_10 = 'http://purl.org/rss/1.0/';
307
 
308
    /**
309
     * RSS 1.0 Content Module Namespace
310
     */
311
    public const NAMESPACE_RSS_10_MODULES_CONTENT = 'http://purl.org/rss/1.0/modules/content/';
312
 
313
    /**
314
     * RSS 2.0 Namespace
315
     * (Stupid, I know, but I'm certain it will confuse people less with support.)
316
     */
317
    public const NAMESPACE_RSS_20 = '';
318
 
319
    /**
320
     * DC 1.0 Namespace
321
     */
322
    public const NAMESPACE_DC_10 = 'http://purl.org/dc/elements/1.0/';
323
 
324
    /**
325
     * DC 1.1 Namespace
326
     */
327
    public const NAMESPACE_DC_11 = 'http://purl.org/dc/elements/1.1/';
328
 
329
    /**
330
     * W3C Basic Geo (WGS84 lat/long) Vocabulary Namespace
331
     */
332
    public const NAMESPACE_W3C_BASIC_GEO = 'http://www.w3.org/2003/01/geo/wgs84_pos#';
333
 
334
    /**
335
     * GeoRSS Namespace
336
     */
337
    public const NAMESPACE_GEORSS = 'http://www.georss.org/georss';
338
 
339
    /**
340
     * Media RSS Namespace
341
     */
342
    public const NAMESPACE_MEDIARSS = 'http://search.yahoo.com/mrss/';
343
 
344
    /**
345
     * Wrong Media RSS Namespace. Caused by a long-standing typo in the spec.
346
     */
347
    public const NAMESPACE_MEDIARSS_WRONG = 'http://search.yahoo.com/mrss';
348
 
349
    /**
350
     * Wrong Media RSS Namespace #2. New namespace introduced in Media RSS 1.5.
351
     */
352
    public const NAMESPACE_MEDIARSS_WRONG2 = 'http://video.search.yahoo.com/mrss';
353
 
354
    /**
355
     * Wrong Media RSS Namespace #3. A possible typo of the Media RSS 1.5 namespace.
356
     */
357
    public const NAMESPACE_MEDIARSS_WRONG3 = 'http://video.search.yahoo.com/mrss/';
358
 
359
    /**
360
     * Wrong Media RSS Namespace #4. New spec location after the RSS Advisory Board takes it over, but not a valid namespace.
361
     */
362
    public const NAMESPACE_MEDIARSS_WRONG4 = 'http://www.rssboard.org/media-rss';
363
 
364
    /**
365
     * Wrong Media RSS Namespace #5. A possible typo of the RSS Advisory Board URL.
366
     */
367
    public const NAMESPACE_MEDIARSS_WRONG5 = 'http://www.rssboard.org/media-rss/';
368
 
369
    /**
370
     * iTunes RSS Namespace
371
     */
372
    public const NAMESPACE_ITUNES = 'http://www.itunes.com/dtds/podcast-1.0.dtd';
373
 
374
    /**
375
     * XHTML Namespace
376
     */
377
    public const NAMESPACE_XHTML = 'http://www.w3.org/1999/xhtml';
378
 
379
    /**
380
     * IANA Link Relations Registry
381
     */
382
    public const IANA_LINK_RELATIONS_REGISTRY = 'http://www.iana.org/assignments/relation/';
383
 
384
    /**
385
     * No file source
386
     */
387
    public const FILE_SOURCE_NONE = 0;
388
 
389
    /**
390
     * Remote file source
391
     */
392
    public const FILE_SOURCE_REMOTE = 1;
393
 
394
    /**
395
     * Local file source
396
     */
397
    public const FILE_SOURCE_LOCAL = 2;
398
 
399
    /**
400
     * fsockopen() file source
401
     */
402
    public const FILE_SOURCE_FSOCKOPEN = 4;
403
 
404
    /**
405
     * cURL file source
406
     */
407
    public const FILE_SOURCE_CURL = 8;
408
 
409
    /**
410
     * file_get_contents() file source
411
     */
412
    public const FILE_SOURCE_FILE_GET_CONTENTS = 16;
413
 
414
    /**
415
     * @var array Raw data
416
     * @access private
417
     */
418
    public $data = [];
419
 
420
    /**
421
     * @var mixed Error string
422
     * @access private
423
     */
424
    public $error;
425
 
426
    /**
427
     * @var int HTTP status code
428
     * @see SimplePie::status_code()
429
     * @access private
430
     */
431
    public $status_code = 0;
432
 
433
    /**
434
     * @var object Instance of \SimplePie\Sanitize (or other class)
435
     * @see SimplePie::set_sanitize_class()
436
     * @access private
437
     */
438
    public $sanitize;
439
 
440
    /**
441
     * @var string SimplePie Useragent
442
     * @see SimplePie::set_useragent()
443
     * @access private
444
     */
445
    public $useragent = '';
446
 
447
    /**
448
     * @var string Feed URL
449
     * @see SimplePie::set_feed_url()
450
     * @access private
451
     */
452
    public $feed_url;
453
 
454
    /**
455
     * @var string Original feed URL, or new feed URL iff HTTP 301 Moved Permanently
456
     * @see SimplePie::subscribe_url()
457
     * @access private
458
     */
459
    public $permanent_url = null;
460
 
461
    /**
462
     * @var object Instance of \SimplePie\File to use as a feed
463
     * @see SimplePie::set_file()
464
     * @access private
465
     */
466
    public $file;
467
 
468
    /**
469
     * @var string Raw feed data
470
     * @see SimplePie::set_raw_data()
471
     * @access private
472
     */
473
    public $raw_data;
474
 
475
    /**
476
     * @var int Timeout for fetching remote files
477
     * @see SimplePie::set_timeout()
478
     * @access private
479
     */
480
    public $timeout = 10;
481
 
482
    /**
483
     * @var array Custom curl options
484
     * @see SimplePie::set_curl_options()
485
     * @access private
486
     */
487
    public $curl_options = [];
488
 
489
    /**
490
     * @var bool Forces fsockopen() to be used for remote files instead
491
     * of cURL, even if a new enough version is installed
492
     * @see SimplePie::force_fsockopen()
493
     * @access private
494
     */
495
    public $force_fsockopen = false;
496
 
497
    /**
498
     * @var bool Force the given data/URL to be treated as a feed no matter what
499
     * it appears like
500
     * @see SimplePie::force_feed()
501
     * @access private
502
     */
503
    public $force_feed = false;
504
 
505
    /**
506
     * @var bool Enable/Disable Caching
507
     * @see SimplePie::enable_cache()
508
     * @access private
509
     */
510
    private $enable_cache = true;
511
 
512
    /**
513
     * @var DataCache|null
514
     * @see SimplePie::set_cache()
515
     */
516
    private $cache = null;
517
 
518
    /**
519
     * @var NameFilter
520
     * @see SimplePie::set_cache_namefilter()
521
     */
522
    private $cache_namefilter;
523
 
524
    /**
525
     * @var bool Force SimplePie to fallback to expired cache, if enabled,
526
     * when feed is unavailable.
527
     * @see SimplePie::force_cache_fallback()
528
     * @access private
529
     */
530
    public $force_cache_fallback = false;
531
 
532
    /**
533
     * @var int Cache duration (in seconds)
534
     * @see SimplePie::set_cache_duration()
535
     * @access private
536
     */
537
    public $cache_duration = 3600;
538
 
539
    /**
540
     * @var int Auto-discovery cache duration (in seconds)
541
     * @see SimplePie::set_autodiscovery_cache_duration()
542
     * @access private
543
     */
544
    public $autodiscovery_cache_duration = 604800; // 7 Days.
545
 
546
    /**
547
     * @var string Cache location (relative to executing script)
548
     * @see SimplePie::set_cache_location()
549
     * @access private
550
     */
551
    public $cache_location = './cache';
552
 
553
    /**
554
     * @var string Function that creates the cache filename
555
     * @see SimplePie::set_cache_name_function()
556
     * @access private
557
     */
558
    public $cache_name_function = 'md5';
559
 
560
    /**
561
     * @var bool Reorder feed by date descending
562
     * @see SimplePie::enable_order_by_date()
563
     * @access private
564
     */
565
    public $order_by_date = true;
566
 
567
    /**
568
     * @var mixed Force input encoding to be set to the follow value
569
     * (false, or anything type-cast to false, disables this feature)
570
     * @see SimplePie::set_input_encoding()
571
     * @access private
572
     */
573
    public $input_encoding = false;
574
 
575
    /**
576
     * @var int Feed Autodiscovery Level
577
     * @see SimplePie::set_autodiscovery_level()
578
     * @access private
579
     */
580
    public $autodiscovery = self::LOCATOR_ALL;
581
 
582
    /**
583
     * Class registry object
584
     *
585
     * @var \SimplePie\Registry
586
     */
587
    public $registry;
588
 
589
    /**
590
     * @var int Maximum number of feeds to check with autodiscovery
591
     * @see SimplePie::set_max_checked_feeds()
592
     * @access private
593
     */
594
    public $max_checked_feeds = 10;
595
 
596
    /**
597
     * @var array All the feeds found during the autodiscovery process
598
     * @see SimplePie::get_all_discovered_feeds()
599
     * @access private
600
     */
601
    public $all_discovered_feeds = [];
602
 
603
    /**
604
     * @var string Web-accessible path to the handler_image.php file.
605
     * @see SimplePie::set_image_handler()
606
     * @access private
607
     */
608
    public $image_handler = '';
609
 
610
    /**
611
     * @var array Stores the URLs when multiple feeds are being initialized.
612
     * @see SimplePie::set_feed_url()
613
     * @access private
614
     */
615
    public $multifeed_url = [];
616
 
617
    /**
618
     * @var array Stores SimplePie objects when multiple feeds initialized.
619
     * @access private
620
     */
621
    public $multifeed_objects = [];
622
 
623
    /**
624
     * @var array Stores the get_object_vars() array for use with multifeeds.
625
     * @see SimplePie::set_feed_url()
626
     * @access private
627
     */
628
    public $config_settings = null;
629
 
630
    /**
631
     * @var integer Stores the number of items to return per-feed with multifeeds.
632
     * @see SimplePie::set_item_limit()
633
     * @access private
634
     */
635
    public $item_limit = 0;
636
 
637
    /**
638
     * @var bool Stores if last-modified and/or etag headers were sent with the
639
     * request when checking a feed.
640
     */
641
    public $check_modified = false;
642
 
643
    /**
644
     * @var array Stores the default attributes to be stripped by strip_attributes().
645
     * @see SimplePie::strip_attributes()
646
     * @access private
647
     */
648
    public $strip_attributes = ['bgsound', 'class', 'expr', 'id', 'style', 'onclick', 'onerror', 'onfinish', 'onmouseover', 'onmouseout', 'onfocus', 'onblur', 'lowsrc', 'dynsrc'];
649
 
650
    /**
651
     * @var array Stores the default attributes to add to different tags by add_attributes().
652
     * @see SimplePie::add_attributes()
653
     * @access private
654
     */
655
    public $add_attributes = ['audio' => ['preload' => 'none'], 'iframe' => ['sandbox' => 'allow-scripts allow-same-origin'], 'video' => ['preload' => 'none']];
656
 
657
    /**
658
     * @var array Stores the default tags to be stripped by strip_htmltags().
659
     * @see SimplePie::strip_htmltags()
660
     * @access private
661
     */
662
    public $strip_htmltags = ['base', 'blink', 'body', 'doctype', 'embed', 'font', 'form', 'frame', 'frameset', 'html', 'iframe', 'input', 'marquee', 'meta', 'noscript', 'object', 'param', 'script', 'style'];
663
 
664
    /**
665
     * @var array Stores the default attributes to be renamed by rename_attributes().
666
     * @see SimplePie::rename_attributes()
667
     * @access private
668
     */
669
    public $rename_attributes = [];
670
 
671
    /**
672
     * @var bool Should we throw exceptions, or use the old-style error property?
673
     * @access private
674
     */
675
    public $enable_exceptions = false;
676
 
677
    /**
678
     * The SimplePie class contains feed level data and options
679
     *
680
     * To use SimplePie, create the SimplePie object with no parameters. You can
681
     * then set configuration options using the provided methods. After setting
682
     * them, you must initialise the feed using $feed->init(). At that point the
683
     * object's methods and properties will be available to you.
684
     *
685
     * Previously, it was possible to pass in the feed URL along with cache
686
     * options directly into the constructor. This has been removed as of 1.3 as
687
     * it caused a lot of confusion.
688
     *
689
     * @since 1.0 Preview Release
690
     */
691
    public function __construct()
692
    {
693
        if (version_compare(PHP_VERSION, '7.2', '<')) {
694
            trigger_error('Please upgrade to PHP 7.2 or newer.');
695
            die();
696
        }
697
 
698
        $this->set_useragent();
699
 
700
        $this->set_cache_namefilter(new CallableNameFilter($this->cache_name_function));
701
 
702
        // Other objects, instances created here so we can set options on them
703
        $this->sanitize = new \SimplePie\Sanitize();
704
        $this->registry = new \SimplePie\Registry();
705
 
706
        if (func_num_args() > 0) {
707
            trigger_error('Passing parameters to the constructor is no longer supported. Please use set_feed_url(), set_cache_location(), and set_cache_duration() directly.', \E_USER_DEPRECATED);
708
 
709
            $args = func_get_args();
710
            switch (count($args)) {
711
                case 3:
712
                    $this->set_cache_duration($args[2]);
713
                    // no break
714
                case 2:
715
                    $this->set_cache_location($args[1]);
716
                    // no break
717
                case 1:
718
                    $this->set_feed_url($args[0]);
719
                    $this->init();
720
            }
721
        }
722
    }
723
 
724
    /**
725
     * Used for converting object to a string
726
     */
727
    public function __toString()
728
    {
729
        return md5(serialize($this->data));
730
    }
731
 
732
    /**
733
     * Remove items that link back to this before destroying this object
734
     */
735
    public function __destruct()
736
    {
737
        if (!gc_enabled()) {
738
            if (!empty($this->data['items'])) {
739
                foreach ($this->data['items'] as $item) {
740
                    $item->__destruct();
741
                }
742
                unset($item, $this->data['items']);
743
            }
744
            if (!empty($this->data['ordered_items'])) {
745
                foreach ($this->data['ordered_items'] as $item) {
746
                    $item->__destruct();
747
                }
748
                unset($item, $this->data['ordered_items']);
749
            }
750
        }
751
    }
752
 
753
    /**
754
     * Force the given data/URL to be treated as a feed
755
     *
756
     * This tells SimplePie to ignore the content-type provided by the server.
757
     * Be careful when using this option, as it will also disable autodiscovery.
758
     *
759
     * @since 1.1
760
     * @param bool $enable Force the given data/URL to be treated as a feed
761
     */
762
    public function force_feed($enable = false)
763
    {
764
        $this->force_feed = (bool) $enable;
765
    }
766
 
767
    /**
768
     * Set the URL of the feed you want to parse
769
     *
770
     * This allows you to enter the URL of the feed you want to parse, or the
771
     * website you want to try to use auto-discovery on. This takes priority
772
     * over any set raw data.
773
     *
774
     * You can set multiple feeds to mash together by passing an array instead
775
     * of a string for the $url. Remember that with each additional feed comes
776
     * additional processing and resources.
777
     *
778
     * @since 1.0 Preview Release
779
     * @see set_raw_data()
780
     * @param string|array $url This is the URL (or array of URLs) that you want to parse.
781
     */
782
    public function set_feed_url($url)
783
    {
784
        $this->multifeed_url = [];
785
        if (is_array($url)) {
786
            foreach ($url as $value) {
787
                $this->multifeed_url[] = $this->registry->call(Misc::class, 'fix_protocol', [$value, 1]);
788
            }
789
        } else {
790
            $this->feed_url = $this->registry->call(Misc::class, 'fix_protocol', [$url, 1]);
791
            $this->permanent_url = $this->feed_url;
792
        }
793
    }
794
 
795
    /**
796
     * Set an instance of {@see \SimplePie\File} to use as a feed
797
     *
798
     * @param \SimplePie\File &$file
799
     * @return bool True on success, false on failure
800
     */
801
    public function set_file(&$file)
802
    {
803
        if ($file instanceof \SimplePie\File) {
804
            $this->feed_url = $file->url;
805
            $this->permanent_url = $this->feed_url;
806
            $this->file =& $file;
807
            return true;
808
        }
809
        return false;
810
    }
811
 
812
    /**
813
     * Set the raw XML data to parse
814
     *
815
     * Allows you to use a string of RSS/Atom data instead of a remote feed.
816
     *
817
     * If you have a feed available as a string in PHP, you can tell SimplePie
818
     * to parse that data string instead of a remote feed. Any set feed URL
819
     * takes precedence.
820
     *
821
     * @since 1.0 Beta 3
822
     * @param string $data RSS or Atom data as a string.
823
     * @see set_feed_url()
824
     */
825
    public function set_raw_data($data)
826
    {
827
        $this->raw_data = $data;
828
    }
829
 
830
    /**
831
     * Set the default timeout for fetching remote feeds
832
     *
833
     * This allows you to change the maximum time the feed's server to respond
834
     * and send the feed back.
835
     *
836
     * @since 1.0 Beta 3
837
     * @param int $timeout The maximum number of seconds to spend waiting to retrieve a feed.
838
     */
839
    public function set_timeout($timeout = 10)
840
    {
841
        $this->timeout = (int) $timeout;
842
    }
843
 
844
    /**
845
     * Set custom curl options
846
     *
847
     * This allows you to change default curl options
848
     *
849
     * @since 1.0 Beta 3
850
     * @param array $curl_options Curl options to add to default settings
851
     */
852
    public function set_curl_options(array $curl_options = [])
853
    {
854
        $this->curl_options = $curl_options;
855
    }
856
 
857
    /**
858
     * Force SimplePie to use fsockopen() instead of cURL
859
     *
860
     * @since 1.0 Beta 3
861
     * @param bool $enable Force fsockopen() to be used
862
     */
863
    public function force_fsockopen($enable = false)
864
    {
865
        $this->force_fsockopen = (bool) $enable;
866
    }
867
 
868
    /**
869
     * Enable/disable caching in SimplePie.
870
     *
871
     * This option allows you to disable caching all-together in SimplePie.
872
     * However, disabling the cache can lead to longer load times.
873
     *
874
     * @since 1.0 Preview Release
875
     * @param bool $enable Enable caching
876
     */
877
    public function enable_cache($enable = true)
878
    {
879
        $this->enable_cache = (bool) $enable;
880
    }
881
 
882
    /**
883
     * Set a PSR-16 implementation as cache
884
     *
885
     * @param CacheInterface $psr16cache The PSR-16 cache implementation
886
     *
887
     * @return void
888
     */
889
    public function set_cache(CacheInterface $cache)
890
    {
891
        $this->cache = new Psr16($cache);
892
    }
893
 
894
    /**
895
     * SimplePie to continue to fall back to expired cache, if enabled, when
896
     * feed is unavailable.
897
     *
898
     * This tells SimplePie to ignore any file errors and fall back to cache
899
     * instead. This only works if caching is enabled and cached content
900
     * still exists.
901
     *
902
     * @deprecated since SimplePie 1.8.0, expired cache will not be used anymore.
903
     *
904
     * @param bool $enable Force use of cache on fail.
905
     */
906
    public function force_cache_fallback($enable = false)
907
    {
908
        // @trigger_error(sprintf('SimplePie\SimplePie::force_cache_fallback() is deprecated since SimplePie 1.8.0, expired cache will not be used anymore.'), \E_USER_DEPRECATED);
909
        $this->force_cache_fallback = (bool) $enable;
910
    }
911
 
912
    /**
913
     * Set the length of time (in seconds) that the contents of a feed will be
914
     * cached
915
     *
916
     * @param int $seconds The feed content cache duration
917
     */
918
    public function set_cache_duration($seconds = 3600)
919
    {
920
        $this->cache_duration = (int) $seconds;
921
    }
922
 
923
    /**
924
     * Set the length of time (in seconds) that the autodiscovered feed URL will
925
     * be cached
926
     *
927
     * @param int $seconds The autodiscovered feed URL cache duration.
928
     */
929
    public function set_autodiscovery_cache_duration($seconds = 604800)
930
    {
931
        $this->autodiscovery_cache_duration = (int) $seconds;
932
    }
933
 
934
    /**
935
     * Set the file system location where the cached files should be stored
936
     *
937
     * @deprecated since SimplePie 1.8.0, use \SimplePie\SimplePie::set_cache() instead.
938
     *
939
     * @param string $location The file system location.
940
     */
941
    public function set_cache_location($location = './cache')
942
    {
943
        // @trigger_error(sprintf('SimplePie\SimplePie::set_cache_location() is deprecated since SimplePie 1.8.0, please use "SimplePie\SimplePie::set_cache()" instead.'), \E_USER_DEPRECATED);
944
        $this->cache_location = (string) $location;
945
    }
946
 
947
    /**
948
     * Return the filename (i.e. hash, without path and without extension) of the file to cache a given URL.
949
     *
950
     * @param string $url The URL of the feed to be cached.
951
     * @return string A filename (i.e. hash, without path and without extension).
952
     */
953
    public function get_cache_filename($url)
954
    {
955
        // Append custom parameters to the URL to avoid cache pollution in case of multiple calls with different parameters.
956
        $url .= $this->force_feed ? '#force_feed' : '';
957
        $options = [];
958
        if ($this->timeout != 10) {
959
            $options[CURLOPT_TIMEOUT] = $this->timeout;
960
        }
961
        if ($this->useragent !== \SimplePie\Misc::get_default_useragent()) {
962
            $options[CURLOPT_USERAGENT] = $this->useragent;
963
        }
964
        if (!empty($this->curl_options)) {
965
            foreach ($this->curl_options as $k => $v) {
966
                $options[$k] = $v;
967
            }
968
        }
969
        if (!empty($options)) {
970
            ksort($options);
971
            $url .= '#' . urlencode(var_export($options, true));
972
        }
973
 
974
        return $this->cache_namefilter->filter($url);
975
    }
976
 
977
    /**
978
     * Set whether feed items should be sorted into reverse chronological order
979
     *
980
     * @param bool $enable Sort as reverse chronological order.
981
     */
982
    public function enable_order_by_date($enable = true)
983
    {
984
        $this->order_by_date = (bool) $enable;
985
    }
986
 
987
    /**
988
     * Set the character encoding used to parse the feed
989
     *
990
     * This overrides the encoding reported by the feed, however it will fall
991
     * back to the normal encoding detection if the override fails
992
     *
993
     * @param string $encoding Character encoding
994
     */
995
    public function set_input_encoding($encoding = false)
996
    {
997
        if ($encoding) {
998
            $this->input_encoding = (string) $encoding;
999
        } else {
1000
            $this->input_encoding = false;
1001
        }
1002
    }
1003
 
1004
    /**
1005
     * Set how much feed autodiscovery to do
1006
     *
1007
     * @see \SimplePie\SimplePie::LOCATOR_NONE
1008
     * @see \SimplePie\SimplePie::LOCATOR_AUTODISCOVERY
1009
     * @see \SimplePie\SimplePie::LOCATOR_LOCAL_EXTENSION
1010
     * @see \SimplePie\SimplePie::LOCATOR_LOCAL_BODY
1011
     * @see \SimplePie\SimplePie::LOCATOR_REMOTE_EXTENSION
1012
     * @see \SimplePie\SimplePie::LOCATOR_REMOTE_BODY
1013
     * @see \SimplePie\SimplePie::LOCATOR_ALL
1014
     * @param int $level Feed Autodiscovery Level (level can be a combination of the above constants, see bitwise OR operator)
1015
     */
1016
    public function set_autodiscovery_level($level = self::LOCATOR_ALL)
1017
    {
1018
        $this->autodiscovery = (int) $level;
1019
    }
1020
 
1021
    /**
1022
     * Get the class registry
1023
     *
1024
     * Use this to override SimplePie's default classes
1025
     * @see \SimplePie\Registry
1026
     *
1027
     * @return Registry
1028
     */
1029
    public function &get_registry()
1030
    {
1031
        return $this->registry;
1032
    }
1033
 
1034
    /**
1035
     * Set which class SimplePie uses for caching
1036
     *
1037
     * @deprecated since SimplePie 1.3, use {@see set_cache()} instead
1038
     *
1039
     * @param string $class Name of custom class
1040
     *
1041
     * @return boolean True on success, false otherwise
1042
     */
1043
    public function set_cache_class($class = Cache::class)
1044
    {
1045
        // trigger_error(sprintf('"%s()" is deprecated since SimplePie 1.3, please use "SimplePie\SimplePie::set_cache()" instead.', __METHOD__), \E_USER_DEPRECATED);
1046
 
1047
        return $this->registry->register(Cache::class, $class, true);
1048
    }
1049
 
1050
    /**
1051
     * Set which class SimplePie uses for auto-discovery
1052
     *
1053
     * @deprecated since SimplePie 1.3, use {@see get_registry()} instead
1054
     *
1055
     * @param string $class Name of custom class
1056
     *
1057
     * @return boolean True on success, false otherwise
1058
     */
1059
    public function set_locator_class($class = Locator::class)
1060
    {
1061
        // trigger_error(sprintf('"%s()" is deprecated since SimplePie 1.3, please use "SimplePie\SimplePie::get_registry()" instead.', __METHOD__), \E_USER_DEPRECATED);
1062
 
1063
        return $this->registry->register(Locator::class, $class, true);
1064
    }
1065
 
1066
    /**
1067
     * Set which class SimplePie uses for XML parsing
1068
     *
1069
     * @deprecated since SimplePie 1.3, use {@see get_registry()} instead
1070
     *
1071
     * @param string $class Name of custom class
1072
     *
1073
     * @return boolean True on success, false otherwise
1074
     */
1075
    public function set_parser_class($class = Parser::class)
1076
    {
1077
        // trigger_error(sprintf('"%s()" is deprecated since SimplePie 1.3, please use "SimplePie\SimplePie::get_registry()" instead.', __METHOD__), \E_USER_DEPRECATED);
1078
 
1079
        return $this->registry->register(Parser::class, $class, true);
1080
    }
1081
 
1082
    /**
1083
     * Set which class SimplePie uses for remote file fetching
1084
     *
1085
     * @deprecated since SimplePie 1.3, use {@see get_registry()} instead
1086
     *
1087
     * @param string $class Name of custom class
1088
     *
1089
     * @return boolean True on success, false otherwise
1090
     */
1091
    public function set_file_class($class = File::class)
1092
    {
1093
        // trigger_error(sprintf('"%s()" is deprecated since SimplePie 1.3, please use "SimplePie\SimplePie::get_registry()" instead.', __METHOD__), \E_USER_DEPRECATED);
1094
 
1095
        return $this->registry->register(File::class, $class, true);
1096
    }
1097
 
1098
    /**
1099
     * Set which class SimplePie uses for data sanitization
1100
     *
1101
     * @deprecated since SimplePie 1.3, use {@see get_registry()} instead
1102
     *
1103
     * @param string $class Name of custom class
1104
     *
1105
     * @return boolean True on success, false otherwise
1106
     */
1107
    public function set_sanitize_class($class = Sanitize::class)
1108
    {
1109
        // trigger_error(sprintf('"%s()" is deprecated since SimplePie 1.3, please use "SimplePie\SimplePie::get_registry()" instead.', __METHOD__), \E_USER_DEPRECATED);
1110
 
1111
        return $this->registry->register(Sanitize::class, $class, true);
1112
    }
1113
 
1114
    /**
1115
     * Set which class SimplePie uses for handling feed items
1116
     *
1117
     * @deprecated since SimplePie 1.3, use {@see get_registry()} instead
1118
     *
1119
     * @param string $class Name of custom class
1120
     *
1121
     * @return boolean True on success, false otherwise
1122
     */
1123
    public function set_item_class($class = Item::class)
1124
    {
1125
        // trigger_error(sprintf('"%s()" is deprecated since SimplePie 1.3, please use "SimplePie\SimplePie::get_registry()" instead.', __METHOD__), \E_USER_DEPRECATED);
1126
 
1127
        return $this->registry->register(Item::class, $class, true);
1128
    }
1129
 
1130
    /**
1131
     * Set which class SimplePie uses for handling author data
1132
     *
1133
     * @deprecated since SimplePie 1.3, use {@see get_registry()} instead
1134
     *
1135
     * @param string $class Name of custom class
1136
     *
1137
     * @return boolean True on success, false otherwise
1138
     */
1139
    public function set_author_class($class = Author::class)
1140
    {
1141
        // trigger_error(sprintf('"%s()" is deprecated since SimplePie 1.3, please use "SimplePie\SimplePie::get_registry()" instead.', __METHOD__), \E_USER_DEPRECATED);
1142
 
1143
        return $this->registry->register(Author::class, $class, true);
1144
    }
1145
 
1146
    /**
1147
     * Set which class SimplePie uses for handling category data
1148
     *
1149
     * @deprecated since SimplePie 1.3, use {@see get_registry()} instead
1150
     *
1151
     * @param string $class Name of custom class
1152
     *
1153
     * @return boolean True on success, false otherwise
1154
     */
1155
    public function set_category_class($class = Category::class)
1156
    {
1157
        // trigger_error(sprintf('"%s()" is deprecated since SimplePie 1.3, please use "SimplePie\SimplePie::get_registry()" instead.', __METHOD__), \E_USER_DEPRECATED);
1158
 
1159
        return $this->registry->register(Category::class, $class, true);
1160
    }
1161
 
1162
    /**
1163
     * Set which class SimplePie uses for feed enclosures
1164
     *
1165
     * @deprecated since SimplePie 1.3, use {@see get_registry()} instead
1166
     *
1167
     * @param string $class Name of custom class
1168
     *
1169
     * @return boolean True on success, false otherwise
1170
     */
1171
    public function set_enclosure_class($class = Enclosure::class)
1172
    {
1173
        // trigger_error(sprintf('"%s()" is deprecated since SimplePie 1.3, please use "SimplePie\SimplePie::get_registry()" instead.', __METHOD__), \E_USER_DEPRECATED);
1174
 
1175
        return $this->registry->register(Enclosure::class, $class, true);
1176
    }
1177
 
1178
    /**
1179
     * Set which class SimplePie uses for `<media:text>` captions
1180
     *
1181
     * @deprecated since SimplePie 1.3, use {@see get_registry()} instead
1182
     *
1183
     * @param string $class Name of custom class
1184
     *
1185
     * @return boolean True on success, false otherwise
1186
     */
1187
    public function set_caption_class($class = Caption::class)
1188
    {
1189
        // trigger_error(sprintf('"%s()" is deprecated since SimplePie 1.3, please use "SimplePie\SimplePie::get_registry()" instead.', __METHOD__), \E_USER_DEPRECATED);
1190
 
1191
        return $this->registry->register(Caption::class, $class, true);
1192
    }
1193
 
1194
    /**
1195
     * Set which class SimplePie uses for `<media:copyright>`
1196
     *
1197
     * @deprecated since SimplePie 1.3, use {@see get_registry()} instead
1198
     *
1199
     * @param string $class Name of custom class
1200
     *
1201
     * @return boolean True on success, false otherwise
1202
     */
1203
    public function set_copyright_class($class = Copyright::class)
1204
    {
1205
        // trigger_error(sprintf('"%s()" is deprecated since SimplePie 1.3, please use "SimplePie\SimplePie::get_registry()" instead.', __METHOD__), \E_USER_DEPRECATED);
1206
 
1207
        return $this->registry->register(Copyright::class, $class, true);
1208
    }
1209
 
1210
    /**
1211
     * Set which class SimplePie uses for `<media:credit>`
1212
     *
1213
     * @deprecated since SimplePie 1.3, use {@see get_registry()} instead
1214
     *
1215
     * @param string $class Name of custom class
1216
     *
1217
     * @return boolean True on success, false otherwise
1218
     */
1219
    public function set_credit_class($class = Credit::class)
1220
    {
1221
        // trigger_error(sprintf('"%s()" is deprecated since SimplePie 1.3, please use "SimplePie\SimplePie::get_registry()" instead.', __METHOD__), \E_USER_DEPRECATED);
1222
 
1223
        return $this->registry->register(Credit::class, $class, true);
1224
    }
1225
 
1226
    /**
1227
     * Set which class SimplePie uses for `<media:rating>`
1228
     *
1229
     * @deprecated since SimplePie 1.3, use {@see get_registry()} instead
1230
     *
1231
     * @param string $class Name of custom class
1232
     *
1233
     * @return boolean True on success, false otherwise
1234
     */
1235
    public function set_rating_class($class = Rating::class)
1236
    {
1237
        // trigger_error(sprintf('"%s()" is deprecated since SimplePie 1.3, please use "SimplePie\SimplePie::get_registry()" instead.', __METHOD__), \E_USER_DEPRECATED);
1238
 
1239
        return $this->registry->register(Rating::class, $class, true);
1240
    }
1241
 
1242
    /**
1243
     * Set which class SimplePie uses for `<media:restriction>`
1244
     *
1245
     * @deprecated since SimplePie 1.3, use {@see get_registry()} instead
1246
     *
1247
     * @param string $class Name of custom class
1248
     *
1249
     * @return boolean True on success, false otherwise
1250
     */
1251
    public function set_restriction_class($class = Restriction::class)
1252
    {
1253
        // trigger_error(sprintf('"%s()" is deprecated since SimplePie 1.3, please use "SimplePie\SimplePie::get_registry()" instead.', __METHOD__), \E_USER_DEPRECATED);
1254
 
1255
        return $this->registry->register(Restriction::class, $class, true);
1256
    }
1257
 
1258
    /**
1259
     * Set which class SimplePie uses for content-type sniffing
1260
     *
1261
     * @deprecated since SimplePie 1.3, use {@see get_registry()} instead
1262
     *
1263
     * @param string $class Name of custom class
1264
     *
1265
     * @return boolean True on success, false otherwise
1266
     */
1267
    public function set_content_type_sniffer_class($class = Sniffer::class)
1268
    {
1269
        // trigger_error(sprintf('"%s()" is deprecated since SimplePie 1.3, please use "SimplePie\SimplePie::get_registry()" instead.', __METHOD__), \E_USER_DEPRECATED);
1270
 
1271
        return $this->registry->register(Sniffer::class, $class, true);
1272
    }
1273
 
1274
    /**
1275
     * Set which class SimplePie uses item sources
1276
     *
1277
     * @deprecated since SimplePie 1.3, use {@see get_registry()} instead
1278
     *
1279
     * @param string $class Name of custom class
1280
     *
1281
     * @return boolean True on success, false otherwise
1282
     */
1283
    public function set_source_class($class = Source::class)
1284
    {
1285
        // trigger_error(sprintf('"%s()" is deprecated since SimplePie 1.3, please use "SimplePie\SimplePie::get_registry()" instead.', __METHOD__), \E_USER_DEPRECATED);
1286
 
1287
        return $this->registry->register(Source::class, $class, true);
1288
    }
1289
 
1290
    /**
1291
     * Set the user agent string
1292
     *
1293
     * @param string $ua New user agent string.
1294
     */
1295
    public function set_useragent($ua = null)
1296
    {
1297
        if ($ua === null) {
1298
            $ua = \SimplePie\Misc::get_default_useragent();
1299
        }
1300
 
1301
        $this->useragent = (string) $ua;
1302
    }
1303
 
1304
    /**
1305
     * Set a namefilter to modify the cache filename with
1306
     *
1307
     * @param NameFilter $filter
1308
     *
1309
     * @return void
1310
     */
1311
    public function set_cache_namefilter(NameFilter $filter): void
1312
    {
1313
        $this->cache_namefilter = $filter;
1314
    }
1315
 
1316
    /**
1317
     * Set callback function to create cache filename with
1318
     *
1319
     * @deprecated since SimplePie 1.8.0, use {@see set_cache_namefilter()} instead
1320
     *
1321
     * @param mixed $function Callback function
1322
     */
1323
    public function set_cache_name_function($function = 'md5')
1324
    {
1325
        // trigger_error(sprintf('"%s()" is deprecated since SimplePie 1.8.0, please use "SimplePie\SimplePie::set_cache_namefilter()" instead.', __METHOD__), \E_USER_DEPRECATED);
1326
 
1327
        if (is_callable($function)) {
1328
            $this->cache_name_function = $function;
1329
 
1330
            $this->set_cache_namefilter(new CallableNameFilter($this->cache_name_function));
1331
        }
1332
    }
1333
 
1334
    /**
1335
     * Set options to make SP as fast as possible
1336
     *
1337
     * Forgoes a substantial amount of data sanitization in favor of speed. This
1338
     * turns SimplePie into a dumb parser of feeds.
1339
     *
1340
     * @param bool $set Whether to set them or not
1341
     */
1342
    public function set_stupidly_fast($set = false)
1343
    {
1344
        if ($set) {
1345
            $this->enable_order_by_date(false);
1346
            $this->remove_div(false);
1347
            $this->strip_comments(false);
1348
            $this->strip_htmltags(false);
1349
            $this->strip_attributes(false);
1350
            $this->add_attributes(false);
1351
            $this->set_image_handler(false);
1352
            $this->set_https_domains([]);
1353
        }
1354
    }
1355
 
1356
    /**
1357
     * Set maximum number of feeds to check with autodiscovery
1358
     *
1359
     * @param int $max Maximum number of feeds to check
1360
     */
1361
    public function set_max_checked_feeds($max = 10)
1362
    {
1363
        $this->max_checked_feeds = (int) $max;
1364
    }
1365
 
1366
    public function remove_div($enable = true)
1367
    {
1368
        $this->sanitize->remove_div($enable);
1369
    }
1370
 
1371
    public function strip_htmltags($tags = '', $encode = null)
1372
    {
1373
        if ($tags === '') {
1374
            $tags = $this->strip_htmltags;
1375
        }
1376
        $this->sanitize->strip_htmltags($tags);
1377
        if ($encode !== null) {
1378
            $this->sanitize->encode_instead_of_strip($tags);
1379
        }
1380
    }
1381
 
1382
    public function encode_instead_of_strip($enable = true)
1383
    {
1384
        $this->sanitize->encode_instead_of_strip($enable);
1385
    }
1386
 
1387
    public function rename_attributes($attribs = '')
1388
    {
1389
        if ($attribs === '') {
1390
            $attribs = $this->rename_attributes;
1391
        }
1392
        $this->sanitize->rename_attributes($attribs);
1393
    }
1394
 
1395
    public function strip_attributes($attribs = '')
1396
    {
1397
        if ($attribs === '') {
1398
            $attribs = $this->strip_attributes;
1399
        }
1400
        $this->sanitize->strip_attributes($attribs);
1401
    }
1402
 
1403
    public function add_attributes($attribs = '')
1404
    {
1405
        if ($attribs === '') {
1406
            $attribs = $this->add_attributes;
1407
        }
1408
        $this->sanitize->add_attributes($attribs);
1409
    }
1410
 
1411
    /**
1412
     * Set the output encoding
1413
     *
1414
     * Allows you to override SimplePie's output to match that of your webpage.
1415
     * This is useful for times when your webpages are not being served as
1416
     * UTF-8. This setting will be obeyed by {@see handle_content_type()}, and
1417
     * is similar to {@see set_input_encoding()}.
1418
     *
1419
     * It should be noted, however, that not all character encodings can support
1420
     * all characters. If your page is being served as ISO-8859-1 and you try
1421
     * to display a Japanese feed, you'll likely see garbled characters.
1422
     * Because of this, it is highly recommended to ensure that your webpages
1423
     * are served as UTF-8.
1424
     *
1425
     * The number of supported character encodings depends on whether your web
1426
     * host supports {@link http://php.net/mbstring mbstring},
1427
     * {@link http://php.net/iconv iconv}, or both. See
1428
     * {@link http://simplepie.org/wiki/faq/Supported_Character_Encodings} for
1429
     * more information.
1430
     *
1431
     * @param string $encoding
1432
     */
1433
    public function set_output_encoding($encoding = 'UTF-8')
1434
    {
1435
        $this->sanitize->set_output_encoding($encoding);
1436
    }
1437
 
1438
    public function strip_comments($strip = false)
1439
    {
1440
        $this->sanitize->strip_comments($strip);
1441
    }
1442
 
1443
    /**
1444
     * Set element/attribute key/value pairs of HTML attributes
1445
     * containing URLs that need to be resolved relative to the feed
1446
     *
1447
     * Defaults to |a|@href, |area|@href, |blockquote|@cite, |del|@cite,
1448
     * |form|@action, |img|@longdesc, |img|@src, |input|@src, |ins|@cite,
1449
     * |q|@cite
1450
     *
1451
     * @since 1.0
1452
     * @param array|null $element_attribute Element/attribute key/value pairs, null for default
1453
     */
1454
    public function set_url_replacements($element_attribute = null)
1455
    {
1456
        $this->sanitize->set_url_replacements($element_attribute);
1457
    }
1458
 
1459
    /**
1460
     * Set the list of domains for which to force HTTPS.
1461
     * @see \SimplePie\Sanitize::set_https_domains()
1462
     * @param array List of HTTPS domains. Example array('biz', 'example.com', 'example.org', 'www.example.net').
1463
     */
1464
    public function set_https_domains($domains = [])
1465
    {
1466
        if (is_array($domains)) {
1467
            $this->sanitize->set_https_domains($domains);
1468
        }
1469
    }
1470
 
1471
    /**
1472
     * Set the handler to enable the display of cached images.
1473
     *
1474
     * @param string $page Web-accessible path to the handler_image.php file.
1475
     * @param string $qs The query string that the value should be passed to.
1476
     */
1477
    public function set_image_handler($page = false, $qs = 'i')
1478
    {
1479
        if ($page !== false) {
1480
            $this->sanitize->set_image_handler($page . '?' . $qs . '=');
1481
        } else {
1482
            $this->image_handler = '';
1483
        }
1484
    }
1485
 
1486
    /**
1487
     * Set the limit for items returned per-feed with multifeeds
1488
     *
1489
     * @param integer $limit The maximum number of items to return.
1490
     */
1491
    public function set_item_limit($limit = 0)
1492
    {
1493
        $this->item_limit = (int) $limit;
1494
    }
1495
 
1496
    /**
1497
     * Enable throwing exceptions
1498
     *
1499
     * @param boolean $enable Should we throw exceptions, or use the old-style error property?
1500
     */
1501
    public function enable_exceptions($enable = true)
1502
    {
1503
        $this->enable_exceptions = $enable;
1504
    }
1505
 
1506
    /**
1507
     * Initialize the feed object
1508
     *
1509
     * This is what makes everything happen. Period. This is where all of the
1510
     * configuration options get processed, feeds are fetched, cached, and
1511
     * parsed, and all of that other good stuff.
1512
     *
1513
     * @return boolean True if successful, false otherwise
1514
     */
1515
    public function init()
1516
    {
1517
        // Check absolute bare minimum requirements.
1518
        if (!extension_loaded('xml') || !extension_loaded('pcre')) {
1519
            $this->error = 'XML or PCRE extensions not loaded!';
1520
            return false;
1521
        }
1522
        // Then check the xml extension is sane (i.e., libxml 2.7.x issue on PHP < 5.2.9 and libxml 2.7.0 to 2.7.2 on any version) if we don't have xmlreader.
1523
        elseif (!extension_loaded('xmlreader')) {
1524
            static $xml_is_sane = null;
1525
            if ($xml_is_sane === null) {
1526
                $parser_check = xml_parser_create();
1527
                xml_parse_into_struct($parser_check, '<foo>&amp;</foo>', $values);
1528
                xml_parser_free($parser_check);
1529
                $xml_is_sane = isset($values[0]['value']);
1530
            }
1531
            if (!$xml_is_sane) {
1532
                return false;
1533
            }
1534
        }
1535
 
1536
        // The default sanitize class gets set in the constructor, check if it has
1537
        // changed.
1538
        if ($this->registry->get_class(Sanitize::class) !== 'SimplePie\Sanitize') {
1539
            $this->sanitize = $this->registry->create(Sanitize::class);
1540
        }
1541
        if (method_exists($this->sanitize, 'set_registry')) {
1542
            $this->sanitize->set_registry($this->registry);
1543
        }
1544
 
1545
        // Pass whatever was set with config options over to the sanitizer.
1546
        // Pass the classes in for legacy support; new classes should use the registry instead
1547
        $this->sanitize->pass_cache_data(
1548
            $this->enable_cache,
1549
            $this->cache_location,
1550
            $this->cache_namefilter,
1551
            $this->registry->get_class(Cache::class),
1552
            $this->cache
1553
        );
1554
        $this->sanitize->pass_file_data($this->registry->get_class(File::class), $this->timeout, $this->useragent, $this->force_fsockopen, $this->curl_options);
1555
 
1556
        if (!empty($this->multifeed_url)) {
1557
            $i = 0;
1558
            $success = 0;
1559
            $this->multifeed_objects = [];
1560
            $this->error = [];
1561
            foreach ($this->multifeed_url as $url) {
1562
                $this->multifeed_objects[$i] = clone $this;
1563
                $this->multifeed_objects[$i]->set_feed_url($url);
1564
                $single_success = $this->multifeed_objects[$i]->init();
1565
                $success |= $single_success;
1566
                if (!$single_success) {
1567
                    $this->error[$i] = $this->multifeed_objects[$i]->error();
1568
                }
1569
                $i++;
1570
            }
1571
            return (bool) $success;
1572
        } elseif ($this->feed_url === null && $this->raw_data === null) {
1573
            return false;
1574
        }
1575
 
1576
        $this->error = null;
1577
        $this->data = [];
1578
        $this->check_modified = false;
1579
        $this->multifeed_objects = [];
1580
        $cache = false;
1581
 
1582
        if ($this->feed_url !== null) {
1583
            $parsed_feed_url = $this->registry->call(Misc::class, 'parse_url', [$this->feed_url]);
1584
 
1585
            // Decide whether to enable caching
1586
            if ($this->enable_cache && $parsed_feed_url['scheme'] !== '') {
1587
                $cache = $this->get_cache($this->feed_url);
1588
            }
1589
 
1590
            // Fetch the data via \SimplePie\File into $this->raw_data
1591
            if (($fetched = $this->fetch_data($cache)) === true) {
1592
                return true;
1593
            } elseif ($fetched === false) {
1594
                return false;
1595
            }
1596
 
1597
            [$headers, $sniffed] = $fetched;
1598
        }
1599
 
1600
        // Empty response check
1601
        if (empty($this->raw_data)) {
1602
            $this->error = "A feed could not be found at `$this->feed_url`. Empty body.";
1603
            $this->registry->call(Misc::class, 'error', [$this->error, E_USER_NOTICE, __FILE__, __LINE__]);
1604
            return false;
1605
        }
1606
 
1607
        // Set up array of possible encodings
1608
        $encodings = [];
1609
 
1610
        // First check to see if input has been overridden.
1611
        if ($this->input_encoding !== false) {
1612
            $encodings[] = strtoupper($this->input_encoding);
1613
        }
1614
 
1615
        $application_types = ['application/xml', 'application/xml-dtd', 'application/xml-external-parsed-entity'];
1616
        $text_types = ['text/xml', 'text/xml-external-parsed-entity'];
1617
 
1618
        // RFC 3023 (only applies to sniffed content)
1619
        if (isset($sniffed)) {
1620
            if (in_array($sniffed, $application_types) || substr($sniffed, 0, 12) === 'application/' && substr($sniffed, -4) === '+xml') {
1621
                if (isset($headers['content-type']) && preg_match('/;\x20?charset=([^;]*)/i', $headers['content-type'], $charset)) {
1622
                    $encodings[] = strtoupper($charset[1]);
1623
                }
1624
                $encodings = array_merge($encodings, $this->registry->call(Misc::class, 'xml_encoding', [$this->raw_data, &$this->registry]));
1625
                $encodings[] = 'UTF-8';
1626
            } elseif (in_array($sniffed, $text_types) || substr($sniffed, 0, 5) === 'text/' && substr($sniffed, -4) === '+xml') {
1627
                if (isset($headers['content-type']) && preg_match('/;\x20?charset=([^;]*)/i', $headers['content-type'], $charset)) {
1628
                    $encodings[] = strtoupper($charset[1]);
1629
                }
1630
                $encodings[] = 'US-ASCII';
1631
            }
1632
            // Text MIME-type default
1633
            elseif (substr($sniffed, 0, 5) === 'text/') {
1634
                $encodings[] = 'UTF-8';
1635
            }
1636
        }
1637
 
1638
        // Fallback to XML 1.0 Appendix F.1/UTF-8/ISO-8859-1
1639
        $encodings = array_merge($encodings, $this->registry->call(Misc::class, 'xml_encoding', [$this->raw_data, &$this->registry]));
1640
        $encodings[] = 'UTF-8';
1641
        $encodings[] = 'ISO-8859-1';
1642
 
1643
        // There's no point in trying an encoding twice
1644
        $encodings = array_unique($encodings);
1645
 
1646
        // Loop through each possible encoding, till we return something, or run out of possibilities
1647
        foreach ($encodings as $encoding) {
1648
            // Change the encoding to UTF-8 (as we always use UTF-8 internally)
1649
            if ($utf8_data = $this->registry->call(Misc::class, 'change_encoding', [$this->raw_data, $encoding, 'UTF-8'])) {
1650
                // Create new parser
1651
                $parser = $this->registry->create(Parser::class);
1652
 
1653
                // If it's parsed fine
1654
                if ($parser->parse($utf8_data, 'UTF-8', $this->permanent_url)) {
1655
                    $this->data = $parser->get_data();
1656
                    if (!($this->get_type() & ~self::TYPE_NONE)) {
1657
                        $this->error = "A feed could not be found at `$this->feed_url`. This does not appear to be a valid RSS or Atom feed.";
1658
                        $this->registry->call(Misc::class, 'error', [$this->error, E_USER_NOTICE, __FILE__, __LINE__]);
1659
                        return false;
1660
                    }
1661
 
1662
                    if (isset($headers)) {
1663
                        $this->data['headers'] = $headers;
1664
                    }
1665
                    $this->data['build'] = \SimplePie\Misc::get_build();
1666
 
1667
                    // Cache the file if caching is enabled
1668
                    $this->data['cache_expiration_time'] = $this->cache_duration + time();
1669
                    if ($cache && ! $cache->set_data($this->get_cache_filename($this->feed_url), $this->data, $this->cache_duration)) {
1670
                        trigger_error("$this->cache_location is not writable. Make sure you've set the correct relative or absolute path, and that the location is server-writable.", E_USER_WARNING);
1671
                    }
1672
                    return true;
1673
                }
1674
            }
1675
        }
1676
 
1677
        if (isset($parser)) {
1678
            // We have an error, just set \SimplePie\Misc::error to it and quit
1679
            $this->error = $this->feed_url;
1680
            $this->error .= sprintf(' is invalid XML, likely due to invalid characters. XML error: %s at line %d, column %d', $parser->get_error_string(), $parser->get_current_line(), $parser->get_current_column());
1681
        } else {
1682
            $this->error = 'The data could not be converted to UTF-8.';
1683
            if (!extension_loaded('mbstring') && !extension_loaded('iconv') && !class_exists('\UConverter')) {
1684
                $this->error .= ' You MUST have either the iconv, mbstring or intl (PHP 5.5+) extension installed and enabled.';
1685
            } else {
1686
                $missingExtensions = [];
1687
                if (!extension_loaded('iconv')) {
1688
                    $missingExtensions[] = 'iconv';
1689
                }
1690
                if (!extension_loaded('mbstring')) {
1691
                    $missingExtensions[] = 'mbstring';
1692
                }
1693
                if (!class_exists('\UConverter')) {
1694
                    $missingExtensions[] = 'intl (PHP 5.5+)';
1695
                }
1696
                $this->error .= ' Try installing/enabling the ' . implode(' or ', $missingExtensions) . ' extension.';
1697
            }
1698
        }
1699
 
1700
        $this->registry->call(Misc::class, 'error', [$this->error, E_USER_NOTICE, __FILE__, __LINE__]);
1701
 
1702
        return false;
1703
    }
1704
 
1705
    /**
1706
     * Fetch the data via \SimplePie\File
1707
     *
1708
     * If the data is already cached, attempt to fetch it from there instead
1709
     * @param Base|DataCache|false $cache Cache handler, or false to not load from the cache
1710
     * @return array|true Returns true if the data was loaded from the cache, or an array of HTTP headers and sniffed type
1711
     */
1712
    protected function fetch_data(&$cache)
1713
    {
1714
        if (is_object($cache) && $cache instanceof Base) {
1715
            // @trigger_error(sprintf('Providing $cache as "\SimplePie\Cache\Base" in %s() is deprecated since SimplePie 1.8.0, please provide "\SimplePie\Cache\DataCache" implementation instead.', __METHOD__), \E_USER_DEPRECATED);
1716
            $cache = new BaseDataCache($cache);
1717
        }
1718
 
1719
        if ($cache !== false && ! $cache instanceof DataCache) {
1720
            throw new InvalidArgumentException(sprintf(
1721
                '%s(): Argument #1 ($cache) must be of type %s|false',
1722
                __METHOD__,
1723
                DataCache::class
1724
            ), 1);
1725
        }
1726
 
1727
        $cacheKey = $this->get_cache_filename($this->feed_url);
1728
 
1729
        // If it's enabled, use the cache
1730
        if ($cache) {
1731
            // Load the Cache
1732
            $this->data = $cache->get_data($cacheKey, []);
1733
 
1734
            if (!empty($this->data)) {
1735
                // If the cache is for an outdated build of SimplePie
1736
                if (!isset($this->data['build']) || $this->data['build'] !== \SimplePie\Misc::get_build()) {
1737
                    $cache->delete_data($cacheKey);
1738
                    $this->data = [];
1739
                }
1740
                // If we've hit a collision just rerun it with caching disabled
1741
                elseif (isset($this->data['url']) && $this->data['url'] !== $this->feed_url) {
1742
                    $cache = false;
1743
                    $this->data = [];
1744
                }
1745
                // If we've got a non feed_url stored (if the page isn't actually a feed, or is a redirect) use that URL.
1746
                elseif (isset($this->data['feed_url'])) {
1747
                    // Do not need to do feed autodiscovery yet.
1748
                    if ($this->data['feed_url'] !== $this->data['url']) {
1749
                        $this->set_feed_url($this->data['feed_url']);
1750
                        $this->data['url'] = $this->data['feed_url'];
1751
 
1752
                        $cache->set_data($this->get_cache_filename($this->feed_url), $this->data, $this->autodiscovery_cache_duration);
1753
 
1754
                        return $this->init();
1755
                    }
1756
 
1757
                    $cache->delete_data($this->get_cache_filename($this->feed_url));
1758
                    $this->data = [];
1759
                }
1760
                // Check if the cache has been updated
1761
                elseif (isset($this->data['cache_expiration_time']) && $this->data['cache_expiration_time'] > time()) {
1762
                    // Want to know if we tried to send last-modified and/or etag headers
1763
                    // when requesting this file. (Note that it's up to the file to
1764
                    // support this, but we don't always send the headers either.)
1765
                    $this->check_modified = true;
1766
                    if (isset($this->data['headers']['last-modified']) || isset($this->data['headers']['etag'])) {
1767
                        $headers = [
1768
                            'Accept' => 'application/atom+xml, application/rss+xml, application/rdf+xml;q=0.9, application/xml;q=0.8, text/xml;q=0.8, text/html;q=0.7, unknown/unknown;q=0.1, application/unknown;q=0.1, */*;q=0.1',
1769
                        ];
1770
                        if (isset($this->data['headers']['last-modified'])) {
1771
                            $headers['if-modified-since'] = $this->data['headers']['last-modified'];
1772
                        }
1773
                        if (isset($this->data['headers']['etag'])) {
1774
                            $headers['if-none-match'] = $this->data['headers']['etag'];
1775
                        }
1776
 
1777
                        $file = $this->registry->create(File::class, [$this->feed_url, $this->timeout/10, 5, $headers, $this->useragent, $this->force_fsockopen, $this->curl_options]);
1778
                        $this->status_code = $file->status_code;
1779
 
1780
                        if ($file->success) {
1781
                            if ($file->status_code === 304) {
1782
                                // Set raw_data to false here too, to signify that the cache
1783
                                // is still valid.
1784
                                $this->raw_data = false;
1785
                                $cache->set_data($cacheKey, $this->data, $this->cache_duration);
1786
                                return true;
1787
                            }
1788
                        } else {
1789
                            $this->check_modified = false;
1790
                            if ($this->force_cache_fallback) {
1791
                                $cache->set_data($cacheKey, $this->data, $this->cache_duration);
1792
                                return true;
1793
                            }
1794
 
1795
                            unset($file);
1796
                        }
1797
                    }
1798
                }
1799
                // If the cache is still valid, just return true
1800
                else {
1801
                    $this->raw_data = false;
1802
                    return true;
1803
                }
1804
            }
1805
            // If the cache is empty
1806
            else {
1807
                $this->data = [];
1808
            }
1809
        }
1810
 
1811
        // If we don't already have the file (it'll only exist if we've opened it to check if the cache has been modified), open it.
1812
        if (!isset($file)) {
1813
            if ($this->file instanceof \SimplePie\File && $this->file->url === $this->feed_url) {
1814
                $file =& $this->file;
1815
            } else {
1816
                $headers = [
1817
                    'Accept' => 'application/atom+xml, application/rss+xml, application/rdf+xml;q=0.9, application/xml;q=0.8, text/xml;q=0.8, text/html;q=0.7, unknown/unknown;q=0.1, application/unknown;q=0.1, */*;q=0.1',
1818
                ];
1819
                $file = $this->registry->create(File::class, [$this->feed_url, $this->timeout, 5, $headers, $this->useragent, $this->force_fsockopen, $this->curl_options]);
1820
            }
1821
        }
1822
        $this->status_code = $file->status_code;
1823
 
1824
        // If the file connection has an error, set SimplePie::error to that and quit
1825
        if (!$file->success && !($file->method & self::FILE_SOURCE_REMOTE === 0 || ($file->status_code === 200 || $file->status_code > 206 && $file->status_code < 300))) {
1826
            $this->error = $file->error;
1827
            return !empty($this->data);
1828
        }
1829
 
1830
        if (!$this->force_feed) {
1831
            // Check if the supplied URL is a feed, if it isn't, look for it.
1832
            $locate = $this->registry->create(Locator::class, [&$file, $this->timeout, $this->useragent, $this->max_checked_feeds, $this->force_fsockopen, $this->curl_options]);
1833
 
1834
            if (!$locate->is_feed($file)) {
1835
                $copyStatusCode = $file->status_code;
1836
                $copyContentType = $file->headers['content-type'];
1837
                try {
1838
                    $microformats = false;
1839
                    if (class_exists('DOMXpath') && function_exists('Mf2\parse')) {
1840
                        $doc = new \DOMDocument();
1841
                        @$doc->loadHTML($file->body);
1842
                        $xpath = new \DOMXpath($doc);
1843
                        // Check for both h-feed and h-entry, as both a feed with no entries
1844
                        // and a list of entries without an h-feed wrapper are both valid.
1845
                        $query = '//*[contains(concat(" ", @class, " "), " h-feed ") or '.
1846
                            'contains(concat(" ", @class, " "), " h-entry ")]';
1847
                        $result = $xpath->query($query);
1848
                        $microformats = $result->length !== 0;
1849
                    }
1850
                    // Now also do feed discovery, but if microformats were found don't
1851
                    // overwrite the current value of file.
1852
                    $discovered = $locate->find(
1853
                        $this->autodiscovery,
1854
                        $this->all_discovered_feeds
1855
                    );
1856
                    if ($microformats) {
1857
                        if ($hub = $locate->get_rel_link('hub')) {
1858
                            $self = $locate->get_rel_link('self');
1859
                            $this->store_links($file, $hub, $self);
1860
                        }
1861
                        // Push the current file onto all_discovered feeds so the user can
1862
                        // be shown this as one of the options.
1863
                        if (isset($this->all_discovered_feeds)) {
1864
                            $this->all_discovered_feeds[] = $file;
1865
                        }
1866
                    } else {
1867
                        if ($discovered) {
1868
                            $file = $discovered;
1869
                        } else {
1870
                            // We need to unset this so that if SimplePie::set_file() has
1871
                            // been called that object is untouched
1872
                            unset($file);
1873
                            $this->error = "A feed could not be found at `$this->feed_url`; the status code is `$copyStatusCode` and content-type is `$copyContentType`";
1874
                            $this->registry->call(Misc::class, 'error', [$this->error, E_USER_NOTICE, __FILE__, __LINE__]);
1875
                            return false;
1876
                        }
1877
                    }
1878
                } catch (\SimplePie\Exception $e) {
1879
                    // We need to unset this so that if SimplePie::set_file() has been called that object is untouched
1880
                    unset($file);
1881
                    // This is usually because DOMDocument doesn't exist
1882
                    $this->error = $e->getMessage();
1883
                    $this->registry->call(Misc::class, 'error', [$this->error, E_USER_NOTICE, $e->getFile(), $e->getLine()]);
1884
                    return false;
1885
                }
1886
 
1887
                if ($cache) {
1888
                    $this->data = [
1889
                        'url' => $this->feed_url,
1890
                        'feed_url' => $file->url,
1891
                        'build' => \SimplePie\Misc::get_build(),
1892
                        'cache_expiration_time' => $this->cache_duration + time(),
1893
                    ];
1894
 
1895
                    if (!$cache->set_data($cacheKey, $this->data, $this->cache_duration)) {
1896
                        trigger_error("$this->cache_location is not writable. Make sure you've set the correct relative or absolute path, and that the location is server-writable.", E_USER_WARNING);
1897
                    }
1898
                }
1899
            }
1900
            $this->feed_url = $file->url;
1901
            $locate = null;
1902
        }
1903
 
1904
        $this->raw_data = $file->body;
1905
        $this->permanent_url = $file->permanent_url;
1906
        $headers = $file->headers;
1907
        $sniffer = $this->registry->create(Sniffer::class, [&$file]);
1908
        $sniffed = $sniffer->get_type();
1909
 
1910
        return [$headers, $sniffed];
1911
    }
1912
 
1913
    /**
1914
     * Get the error message for the occurred error
1915
     *
1916
     * @return string|array Error message, or array of messages for multifeeds
1917
     */
1918
    public function error()
1919
    {
1920
        return $this->error;
1921
    }
1922
 
1923
    /**
1924
     * Get the last HTTP status code
1925
     *
1926
     * @return int Status code
1927
     */
1928
    public function status_code()
1929
    {
1930
        return $this->status_code;
1931
    }
1932
 
1933
    /**
1934
     * Get the raw XML
1935
     *
1936
     * This is the same as the old `$feed->enable_xml_dump(true)`, but returns
1937
     * the data instead of printing it.
1938
     *
1939
     * @return string|boolean Raw XML data, false if the cache is used
1940
     */
1941
    public function get_raw_data()
1942
    {
1943
        return $this->raw_data;
1944
    }
1945
 
1946
    /**
1947
     * Get the character encoding used for output
1948
     *
1949
     * @since Preview Release
1950
     * @return string
1951
     */
1952
    public function get_encoding()
1953
    {
1954
        return $this->sanitize->output_encoding;
1955
    }
1956
 
1957
    /**
1958
     * Send the content-type header with correct encoding
1959
     *
1960
     * This method ensures that the SimplePie-enabled page is being served with
1961
     * the correct {@link http://www.iana.org/assignments/media-types/ mime-type}
1962
     * and character encoding HTTP headers (character encoding determined by the
1963
     * {@see set_output_encoding} config option).
1964
     *
1965
     * This won't work properly if any content or whitespace has already been
1966
     * sent to the browser, because it relies on PHP's
1967
     * {@link http://php.net/header header()} function, and these are the
1968
     * circumstances under which the function works.
1969
     *
1970
     * Because it's setting these settings for the entire page (as is the nature
1971
     * of HTTP headers), this should only be used once per page (again, at the
1972
     * top).
1973
     *
1974
     * @param string $mime MIME type to serve the page as
1975
     */
1976
    public function handle_content_type($mime = 'text/html')
1977
    {
1978
        if (!headers_sent()) {
1979
            $header = "Content-type: $mime;";
1980
            if ($this->get_encoding()) {
1981
                $header .= ' charset=' . $this->get_encoding();
1982
            } else {
1983
                $header .= ' charset=UTF-8';
1984
            }
1985
            header($header);
1986
        }
1987
    }
1988
 
1989
    /**
1990
     * Get the type of the feed
1991
     *
1992
     * This returns a \SimplePie\SimplePie::TYPE_* constant, which can be tested against
1993
     * using {@link http://php.net/language.operators.bitwise bitwise operators}
1994
     *
1995
     * @since 0.8 (usage changed to using constants in 1.0)
1996
     * @see \SimplePie\SimplePie::TYPE_NONE Unknown.
1997
     * @see \SimplePie\SimplePie::TYPE_RSS_090 RSS 0.90.
1998
     * @see \SimplePie\SimplePie::TYPE_RSS_091_NETSCAPE RSS 0.91 (Netscape).
1999
     * @see \SimplePie\SimplePie::TYPE_RSS_091_USERLAND RSS 0.91 (Userland).
2000
     * @see \SimplePie\SimplePie::TYPE_RSS_091 RSS 0.91.
2001
     * @see \SimplePie\SimplePie::TYPE_RSS_092 RSS 0.92.
2002
     * @see \SimplePie\SimplePie::TYPE_RSS_093 RSS 0.93.
2003
     * @see \SimplePie\SimplePie::TYPE_RSS_094 RSS 0.94.
2004
     * @see \SimplePie\SimplePie::TYPE_RSS_10 RSS 1.0.
2005
     * @see \SimplePie\SimplePie::TYPE_RSS_20 RSS 2.0.x.
2006
     * @see \SimplePie\SimplePie::TYPE_RSS_RDF RDF-based RSS.
2007
     * @see \SimplePie\SimplePie::TYPE_RSS_SYNDICATION Non-RDF-based RSS (truly intended as syndication format).
2008
     * @see \SimplePie\SimplePie::TYPE_RSS_ALL Any version of RSS.
2009
     * @see \SimplePie\SimplePie::TYPE_ATOM_03 Atom 0.3.
2010
     * @see \SimplePie\SimplePie::TYPE_ATOM_10 Atom 1.0.
2011
     * @see \SimplePie\SimplePie::TYPE_ATOM_ALL Any version of Atom.
2012
     * @see \SimplePie\SimplePie::TYPE_ALL Any known/supported feed type.
2013
     * @return int \SimplePie\SimplePie::TYPE_* constant
2014
     */
2015
    public function get_type()
2016
    {
2017
        if (!isset($this->data['type'])) {
2018
            $this->data['type'] = self::TYPE_ALL;
2019
            if (isset($this->data['child'][self::NAMESPACE_ATOM_10]['feed'])) {
2020
                $this->data['type'] &= self::TYPE_ATOM_10;
2021
            } elseif (isset($this->data['child'][self::NAMESPACE_ATOM_03]['feed'])) {
2022
                $this->data['type'] &= self::TYPE_ATOM_03;
2023
            } elseif (isset($this->data['child'][self::NAMESPACE_RDF]['RDF'])) {
2024
                if (isset($this->data['child'][self::NAMESPACE_RDF]['RDF'][0]['child'][self::NAMESPACE_RSS_10]['channel'])
2025
                || isset($this->data['child'][self::NAMESPACE_RDF]['RDF'][0]['child'][self::NAMESPACE_RSS_10]['image'])
2026
                || isset($this->data['child'][self::NAMESPACE_RDF]['RDF'][0]['child'][self::NAMESPACE_RSS_10]['item'])
2027
                || isset($this->data['child'][self::NAMESPACE_RDF]['RDF'][0]['child'][self::NAMESPACE_RSS_10]['textinput'])) {
2028
                    $this->data['type'] &= self::TYPE_RSS_10;
2029
                }
2030
                if (isset($this->data['child'][self::NAMESPACE_RDF]['RDF'][0]['child'][self::NAMESPACE_RSS_090]['channel'])
2031
                || isset($this->data['child'][self::NAMESPACE_RDF]['RDF'][0]['child'][self::NAMESPACE_RSS_090]['image'])
2032
                || isset($this->data['child'][self::NAMESPACE_RDF]['RDF'][0]['child'][self::NAMESPACE_RSS_090]['item'])
2033
                || isset($this->data['child'][self::NAMESPACE_RDF]['RDF'][0]['child'][self::NAMESPACE_RSS_090]['textinput'])) {
2034
                    $this->data['type'] &= self::TYPE_RSS_090;
2035
                }
2036
            } elseif (isset($this->data['child'][self::NAMESPACE_RSS_20]['rss'])) {
2037
                $this->data['type'] &= self::TYPE_RSS_ALL;
2038
                if (isset($this->data['child'][self::NAMESPACE_RSS_20]['rss'][0]['attribs']['']['version'])) {
2039
                    switch (trim($this->data['child'][self::NAMESPACE_RSS_20]['rss'][0]['attribs']['']['version'])) {
2040
                        case '0.91':
2041
                            $this->data['type'] &= self::TYPE_RSS_091;
2042
                            if (isset($this->data['child'][self::NAMESPACE_RSS_20]['rss'][0]['child'][self::NAMESPACE_RSS_20]['skiphours']['hour'][0]['data'])) {
2043
                                switch (trim($this->data['child'][self::NAMESPACE_RSS_20]['rss'][0]['child'][self::NAMESPACE_RSS_20]['skiphours']['hour'][0]['data'])) {
2044
                                    case '0':
2045
                                        $this->data['type'] &= self::TYPE_RSS_091_NETSCAPE;
2046
                                        break;
2047
 
2048
                                    case '24':
2049
                                        $this->data['type'] &= self::TYPE_RSS_091_USERLAND;
2050
                                        break;
2051
                                }
2052
                            }
2053
                            break;
2054
 
2055
                        case '0.92':
2056
                            $this->data['type'] &= self::TYPE_RSS_092;
2057
                            break;
2058
 
2059
                        case '0.93':
2060
                            $this->data['type'] &= self::TYPE_RSS_093;
2061
                            break;
2062
 
2063
                        case '0.94':
2064
                            $this->data['type'] &= self::TYPE_RSS_094;
2065
                            break;
2066
 
2067
                        case '2.0':
2068
                            $this->data['type'] &= self::TYPE_RSS_20;
2069
                            break;
2070
                    }
2071
                }
2072
            } else {
2073
                $this->data['type'] = self::TYPE_NONE;
2074
            }
2075
        }
2076
        return $this->data['type'];
2077
    }
2078
 
2079
    /**
2080
     * Get the URL for the feed
2081
     *
2082
     * When the 'permanent' mode is enabled, returns the original feed URL,
2083
     * except in the case of an `HTTP 301 Moved Permanently` status response,
2084
     * in which case the location of the first redirection is returned.
2085
     *
2086
     * When the 'permanent' mode is disabled (default),
2087
     * may or may not be different from the URL passed to {@see set_feed_url()},
2088
     * depending on whether auto-discovery was used, and whether there were
2089
     * any redirects along the way.
2090
     *
2091
     * @since Preview Release (previously called `get_feed_url()` since SimplePie 0.8.)
2092
     * @todo Support <itunes:new-feed-url>
2093
     * @todo Also, |atom:link|@rel=self
2094
     * @param bool $permanent Permanent mode to return only the original URL or the first redirection
2095
     * iff it is a 301 redirection
2096
     * @return string|null
2097
     */
2098
    public function subscribe_url($permanent = false)
2099
    {
2100
        if ($permanent) {
2101
            if ($this->permanent_url !== null) {
2102
                // sanitize encodes ampersands which are required when used in a url.
2103
                return str_replace(
2104
                    '&amp;',
2105
                    '&',
2106
                    $this->sanitize(
2107
                        $this->permanent_url,
2108
                        self::CONSTRUCT_IRI
2109
                    )
2110
                );
2111
            }
2112
        } else {
2113
            if ($this->feed_url !== null) {
2114
                return str_replace(
2115
                    '&amp;',
2116
                    '&',
2117
                    $this->sanitize(
2118
                        $this->feed_url,
2119
                        self::CONSTRUCT_IRI
2120
                    )
2121
                );
2122
            }
2123
        }
2124
        return null;
2125
    }
2126
 
2127
    /**
2128
     * Get data for an feed-level element
2129
     *
2130
     * This method allows you to get access to ANY element/attribute that is a
2131
     * sub-element of the opening feed tag.
2132
     *
2133
     * The return value is an indexed array of elements matching the given
2134
     * namespace and tag name. Each element has `attribs`, `data` and `child`
2135
     * subkeys. For `attribs` and `child`, these contain namespace subkeys.
2136
     * `attribs` then has one level of associative name => value data (where
2137
     * `value` is a string) after the namespace. `child` has tag-indexed keys
2138
     * after the namespace, each member of which is an indexed array matching
2139
     * this same format.
2140
     *
2141
     * For example:
2142
     * <pre>
2143
     * // This is probably a bad example because we already support
2144
     * // <media:content> natively, but it shows you how to parse through
2145
     * // the nodes.
2146
     * $group = $item->get_item_tags(\SimplePie\SimplePie::NAMESPACE_MEDIARSS, 'group');
2147
     * $content = $group[0]['child'][\SimplePie\SimplePie::NAMESPACE_MEDIARSS]['content'];
2148
     * $file = $content[0]['attribs']['']['url'];
2149
     * echo $file;
2150
     * </pre>
2151
     *
2152
     * @since 1.0
2153
     * @see http://simplepie.org/wiki/faq/supported_xml_namespaces
2154
     * @param string $namespace The URL of the XML namespace of the elements you're trying to access
2155
     * @param string $tag Tag name
2156
     * @return array
2157
     */
2158
    public function get_feed_tags($namespace, $tag)
2159
    {
2160
        $type = $this->get_type();
2161
        if ($type & self::TYPE_ATOM_10) {
2162
            if (isset($this->data['child'][self::NAMESPACE_ATOM_10]['feed'][0]['child'][$namespace][$tag])) {
2163
                return $this->data['child'][self::NAMESPACE_ATOM_10]['feed'][0]['child'][$namespace][$tag];
2164
            }
2165
        }
2166
        if ($type & self::TYPE_ATOM_03) {
2167
            if (isset($this->data['child'][self::NAMESPACE_ATOM_03]['feed'][0]['child'][$namespace][$tag])) {
2168
                return $this->data['child'][self::NAMESPACE_ATOM_03]['feed'][0]['child'][$namespace][$tag];
2169
            }
2170
        }
2171
        if ($type & self::TYPE_RSS_RDF) {
2172
            if (isset($this->data['child'][self::NAMESPACE_RDF]['RDF'][0]['child'][$namespace][$tag])) {
2173
                return $this->data['child'][self::NAMESPACE_RDF]['RDF'][0]['child'][$namespace][$tag];
2174
            }
2175
        }
2176
        if ($type & self::TYPE_RSS_SYNDICATION) {
2177
            if (isset($this->data['child'][self::NAMESPACE_RSS_20]['rss'][0]['child'][$namespace][$tag])) {
2178
                return $this->data['child'][self::NAMESPACE_RSS_20]['rss'][0]['child'][$namespace][$tag];
2179
            }
2180
        }
2181
        return null;
2182
    }
2183
 
2184
    /**
2185
     * Get data for an channel-level element
2186
     *
2187
     * This method allows you to get access to ANY element/attribute in the
2188
     * channel/header section of the feed.
2189
     *
2190
     * See {@see SimplePie::get_feed_tags()} for a description of the return value
2191
     *
2192
     * @since 1.0
2193
     * @see http://simplepie.org/wiki/faq/supported_xml_namespaces
2194
     * @param string $namespace The URL of the XML namespace of the elements you're trying to access
2195
     * @param string $tag Tag name
2196
     * @return array
2197
     */
2198
    public function get_channel_tags($namespace, $tag)
2199
    {
2200
        $type = $this->get_type();
2201
        if ($type & self::TYPE_ATOM_ALL) {
2202
            if ($return = $this->get_feed_tags($namespace, $tag)) {
2203
                return $return;
2204
            }
2205
        }
2206
        if ($type & self::TYPE_RSS_10) {
2207
            if ($channel = $this->get_feed_tags(self::NAMESPACE_RSS_10, 'channel')) {
2208
                if (isset($channel[0]['child'][$namespace][$tag])) {
2209
                    return $channel[0]['child'][$namespace][$tag];
2210
                }
2211
            }
2212
        }
2213
        if ($type & self::TYPE_RSS_090) {
2214
            if ($channel = $this->get_feed_tags(self::NAMESPACE_RSS_090, 'channel')) {
2215
                if (isset($channel[0]['child'][$namespace][$tag])) {
2216
                    return $channel[0]['child'][$namespace][$tag];
2217
                }
2218
            }
2219
        }
2220
        if ($type & self::TYPE_RSS_SYNDICATION) {
2221
            if ($channel = $this->get_feed_tags(self::NAMESPACE_RSS_20, 'channel')) {
2222
                if (isset($channel[0]['child'][$namespace][$tag])) {
2223
                    return $channel[0]['child'][$namespace][$tag];
2224
                }
2225
            }
2226
        }
2227
        return null;
2228
    }
2229
 
2230
    /**
2231
     * Get data for an channel-level element
2232
     *
2233
     * This method allows you to get access to ANY element/attribute in the
2234
     * image/logo section of the feed.
2235
     *
2236
     * See {@see SimplePie::get_feed_tags()} for a description of the return value
2237
     *
2238
     * @since 1.0
2239
     * @see http://simplepie.org/wiki/faq/supported_xml_namespaces
2240
     * @param string $namespace The URL of the XML namespace of the elements you're trying to access
2241
     * @param string $tag Tag name
2242
     * @return array
2243
     */
2244
    public function get_image_tags($namespace, $tag)
2245
    {
2246
        $type = $this->get_type();
2247
        if ($type & self::TYPE_RSS_10) {
2248
            if ($image = $this->get_feed_tags(self::NAMESPACE_RSS_10, 'image')) {
2249
                if (isset($image[0]['child'][$namespace][$tag])) {
2250
                    return $image[0]['child'][$namespace][$tag];
2251
                }
2252
            }
2253
        }
2254
        if ($type & self::TYPE_RSS_090) {
2255
            if ($image = $this->get_feed_tags(self::NAMESPACE_RSS_090, 'image')) {
2256
                if (isset($image[0]['child'][$namespace][$tag])) {
2257
                    return $image[0]['child'][$namespace][$tag];
2258
                }
2259
            }
2260
        }
2261
        if ($type & self::TYPE_RSS_SYNDICATION) {
2262
            if ($image = $this->get_channel_tags(self::NAMESPACE_RSS_20, 'image')) {
2263
                if (isset($image[0]['child'][$namespace][$tag])) {
2264
                    return $image[0]['child'][$namespace][$tag];
2265
                }
2266
            }
2267
        }
2268
        return null;
2269
    }
2270
 
2271
    /**
2272
     * Get the base URL value from the feed
2273
     *
2274
     * Uses `<xml:base>` if available, otherwise uses the first link in the
2275
     * feed, or failing that, the URL of the feed itself.
2276
     *
2277
     * @see get_link
2278
     * @see subscribe_url
2279
     *
2280
     * @param array $element
2281
     * @return string
2282
     */
2283
    public function get_base($element = [])
2284
    {
2285
        if (!empty($element['xml_base_explicit']) && isset($element['xml_base'])) {
2286
            return $element['xml_base'];
2287
        } elseif ($this->get_link() !== null) {
2288
            return $this->get_link();
2289
        }
2290
 
2291
        return $this->subscribe_url();
2292
    }
2293
 
2294
    /**
2295
     * Sanitize feed data
2296
     *
2297
     * @access private
2298
     * @see \SimplePie\Sanitize::sanitize()
2299
     * @param string $data Data to sanitize
2300
     * @param int $type One of the \SimplePie\SimplePie::CONSTRUCT_* constants
2301
     * @param string $base Base URL to resolve URLs against
2302
     * @return string Sanitized data
2303
     */
2304
    public function sanitize($data, $type, $base = '')
2305
    {
2306
        try {
2307
            return $this->sanitize->sanitize($data, $type, $base);
2308
        } catch (\SimplePie\Exception $e) {
2309
            if (!$this->enable_exceptions) {
2310
                $this->error = $e->getMessage();
2311
                $this->registry->call(Misc::class, 'error', [$this->error, E_USER_WARNING, $e->getFile(), $e->getLine()]);
2312
                return '';
2313
            }
2314
 
2315
            throw $e;
2316
        }
2317
    }
2318
 
2319
    /**
2320
     * Get the title of the feed
2321
     *
2322
     * Uses `<atom:title>`, `<title>` or `<dc:title>`
2323
     *
2324
     * @since 1.0 (previously called `get_feed_title` since 0.8)
2325
     * @return string|null
2326
     */
2327
    public function get_title()
2328
    {
2329
        if ($return = $this->get_channel_tags(self::NAMESPACE_ATOM_10, 'title')) {
2330
            return $this->sanitize($return[0]['data'], $this->registry->call(Misc::class, 'atom_10_construct_type', [$return[0]['attribs']]), $this->get_base($return[0]));
2331
        } elseif ($return = $this->get_channel_tags(self::NAMESPACE_ATOM_03, 'title')) {
2332
            return $this->sanitize($return[0]['data'], $this->registry->call(Misc::class, 'atom_03_construct_type', [$return[0]['attribs']]), $this->get_base($return[0]));
2333
        } elseif ($return = $this->get_channel_tags(self::NAMESPACE_RSS_10, 'title')) {
2334
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_MAYBE_HTML, $this->get_base($return[0]));
2335
        } elseif ($return = $this->get_channel_tags(self::NAMESPACE_RSS_090, 'title')) {
2336
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_MAYBE_HTML, $this->get_base($return[0]));
2337
        } elseif ($return = $this->get_channel_tags(self::NAMESPACE_RSS_20, 'title')) {
2338
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_MAYBE_HTML, $this->get_base($return[0]));
2339
        } elseif ($return = $this->get_channel_tags(self::NAMESPACE_DC_11, 'title')) {
2340
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_TEXT);
2341
        } elseif ($return = $this->get_channel_tags(self::NAMESPACE_DC_10, 'title')) {
2342
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_TEXT);
2343
        }
2344
 
2345
        return null;
2346
    }
2347
 
2348
    /**
2349
     * Get a category for the feed
2350
     *
2351
     * @since Unknown
2352
     * @param int $key The category that you want to return. Remember that arrays begin with 0, not 1
2353
     * @return \SimplePie\Category|null
2354
     */
2355
    public function get_category($key = 0)
2356
    {
2357
        $categories = $this->get_categories();
2358
        if (isset($categories[$key])) {
2359
            return $categories[$key];
2360
        }
2361
 
2362
        return null;
2363
    }
2364
 
2365
    /**
2366
     * Get all categories for the feed
2367
     *
2368
     * Uses `<atom:category>`, `<category>` or `<dc:subject>`
2369
     *
2370
     * @since Unknown
2371
     * @return array|null List of {@see \SimplePie\Category} objects
2372
     */
2373
    public function get_categories()
2374
    {
2375
        $categories = [];
2376
 
2377
        foreach ((array) $this->get_channel_tags(self::NAMESPACE_ATOM_10, 'category') as $category) {
2378
            $term = null;
2379
            $scheme = null;
2380
            $label = null;
2381
            if (isset($category['attribs']['']['term'])) {
2382
                $term = $this->sanitize($category['attribs']['']['term'], self::CONSTRUCT_TEXT);
2383
            }
2384
            if (isset($category['attribs']['']['scheme'])) {
2385
                $scheme = $this->sanitize($category['attribs']['']['scheme'], self::CONSTRUCT_TEXT);
2386
            }
2387
            if (isset($category['attribs']['']['label'])) {
2388
                $label = $this->sanitize($category['attribs']['']['label'], self::CONSTRUCT_TEXT);
2389
            }
2390
            $categories[] = $this->registry->create(Category::class, [$term, $scheme, $label]);
2391
        }
2392
        foreach ((array) $this->get_channel_tags(self::NAMESPACE_RSS_20, 'category') as $category) {
2393
            // This is really the label, but keep this as the term also for BC.
2394
            // Label will also work on retrieving because that falls back to term.
2395
            $term = $this->sanitize($category['data'], self::CONSTRUCT_TEXT);
2396
            if (isset($category['attribs']['']['domain'])) {
2397
                $scheme = $this->sanitize($category['attribs']['']['domain'], self::CONSTRUCT_TEXT);
2398
            } else {
2399
                $scheme = null;
2400
            }
2401
            $categories[] = $this->registry->create(Category::class, [$term, $scheme, null]);
2402
        }
2403
        foreach ((array) $this->get_channel_tags(self::NAMESPACE_DC_11, 'subject') as $category) {
2404
            $categories[] = $this->registry->create(Category::class, [$this->sanitize($category['data'], self::CONSTRUCT_TEXT), null, null]);
2405
        }
2406
        foreach ((array) $this->get_channel_tags(self::NAMESPACE_DC_10, 'subject') as $category) {
2407
            $categories[] = $this->registry->create(Category::class, [$this->sanitize($category['data'], self::CONSTRUCT_TEXT), null, null]);
2408
        }
2409
 
2410
        if (!empty($categories)) {
2411
            return array_unique($categories);
2412
        }
2413
 
2414
        return null;
2415
    }
2416
 
2417
    /**
2418
     * Get an author for the feed
2419
     *
2420
     * @since 1.1
2421
     * @param int $key The author that you want to return. Remember that arrays begin with 0, not 1
2422
     * @return \SimplePie\Author|null
2423
     */
2424
    public function get_author($key = 0)
2425
    {
2426
        $authors = $this->get_authors();
2427
        if (isset($authors[$key])) {
2428
            return $authors[$key];
2429
        }
2430
 
2431
        return null;
2432
    }
2433
 
2434
    /**
2435
     * Get all authors for the feed
2436
     *
2437
     * Uses `<atom:author>`, `<author>`, `<dc:creator>` or `<itunes:author>`
2438
     *
2439
     * @since 1.1
2440
     * @return array|null List of {@see \SimplePie\Author} objects
2441
     */
2442
    public function get_authors()
2443
    {
2444
        $authors = [];
2445
        foreach ((array) $this->get_channel_tags(self::NAMESPACE_ATOM_10, 'author') as $author) {
2446
            $name = null;
2447
            $uri = null;
2448
            $email = null;
2449
            if (isset($author['child'][self::NAMESPACE_ATOM_10]['name'][0]['data'])) {
2450
                $name = $this->sanitize($author['child'][self::NAMESPACE_ATOM_10]['name'][0]['data'], self::CONSTRUCT_TEXT);
2451
            }
2452
            if (isset($author['child'][self::NAMESPACE_ATOM_10]['uri'][0]['data'])) {
2453
                $uri = $this->sanitize($author['child'][self::NAMESPACE_ATOM_10]['uri'][0]['data'], self::CONSTRUCT_IRI, $this->get_base($author['child'][self::NAMESPACE_ATOM_10]['uri'][0]));
2454
            }
2455
            if (isset($author['child'][self::NAMESPACE_ATOM_10]['email'][0]['data'])) {
2456
                $email = $this->sanitize($author['child'][self::NAMESPACE_ATOM_10]['email'][0]['data'], self::CONSTRUCT_TEXT);
2457
            }
2458
            if ($name !== null || $email !== null || $uri !== null) {
2459
                $authors[] = $this->registry->create(Author::class, [$name, $uri, $email]);
2460
            }
2461
        }
2462
        if ($author = $this->get_channel_tags(self::NAMESPACE_ATOM_03, 'author')) {
2463
            $name = null;
2464
            $url = null;
2465
            $email = null;
2466
            if (isset($author[0]['child'][self::NAMESPACE_ATOM_03]['name'][0]['data'])) {
2467
                $name = $this->sanitize($author[0]['child'][self::NAMESPACE_ATOM_03]['name'][0]['data'], self::CONSTRUCT_TEXT);
2468
            }
2469
            if (isset($author[0]['child'][self::NAMESPACE_ATOM_03]['url'][0]['data'])) {
2470
                $url = $this->sanitize($author[0]['child'][self::NAMESPACE_ATOM_03]['url'][0]['data'], self::CONSTRUCT_IRI, $this->get_base($author[0]['child'][self::NAMESPACE_ATOM_03]['url'][0]));
2471
            }
2472
            if (isset($author[0]['child'][self::NAMESPACE_ATOM_03]['email'][0]['data'])) {
2473
                $email = $this->sanitize($author[0]['child'][self::NAMESPACE_ATOM_03]['email'][0]['data'], self::CONSTRUCT_TEXT);
2474
            }
2475
            if ($name !== null || $email !== null || $url !== null) {
2476
                $authors[] = $this->registry->create(Author::class, [$name, $url, $email]);
2477
            }
2478
        }
2479
        foreach ((array) $this->get_channel_tags(self::NAMESPACE_DC_11, 'creator') as $author) {
2480
            $authors[] = $this->registry->create(Author::class, [$this->sanitize($author['data'], self::CONSTRUCT_TEXT), null, null]);
2481
        }
2482
        foreach ((array) $this->get_channel_tags(self::NAMESPACE_DC_10, 'creator') as $author) {
2483
            $authors[] = $this->registry->create(Author::class, [$this->sanitize($author['data'], self::CONSTRUCT_TEXT), null, null]);
2484
        }
2485
        foreach ((array) $this->get_channel_tags(self::NAMESPACE_ITUNES, 'author') as $author) {
2486
            $authors[] = $this->registry->create(Author::class, [$this->sanitize($author['data'], self::CONSTRUCT_TEXT), null, null]);
2487
        }
2488
 
2489
        if (!empty($authors)) {
2490
            return array_unique($authors);
2491
        }
2492
 
2493
        return null;
2494
    }
2495
 
2496
    /**
2497
     * Get a contributor for the feed
2498
     *
2499
     * @since 1.1
2500
     * @param int $key The contrbutor that you want to return. Remember that arrays begin with 0, not 1
2501
     * @return \SimplePie\Author|null
2502
     */
2503
    public function get_contributor($key = 0)
2504
    {
2505
        $contributors = $this->get_contributors();
2506
        if (isset($contributors[$key])) {
2507
            return $contributors[$key];
2508
        }
2509
 
2510
        return null;
2511
    }
2512
 
2513
    /**
2514
     * Get all contributors for the feed
2515
     *
2516
     * Uses `<atom:contributor>`
2517
     *
2518
     * @since 1.1
2519
     * @return array|null List of {@see \SimplePie\Author} objects
2520
     */
2521
    public function get_contributors()
2522
    {
2523
        $contributors = [];
2524
        foreach ((array) $this->get_channel_tags(self::NAMESPACE_ATOM_10, 'contributor') as $contributor) {
2525
            $name = null;
2526
            $uri = null;
2527
            $email = null;
2528
            if (isset($contributor['child'][self::NAMESPACE_ATOM_10]['name'][0]['data'])) {
2529
                $name = $this->sanitize($contributor['child'][self::NAMESPACE_ATOM_10]['name'][0]['data'], self::CONSTRUCT_TEXT);
2530
            }
2531
            if (isset($contributor['child'][self::NAMESPACE_ATOM_10]['uri'][0]['data'])) {
2532
                $uri = $this->sanitize($contributor['child'][self::NAMESPACE_ATOM_10]['uri'][0]['data'], self::CONSTRUCT_IRI, $this->get_base($contributor['child'][self::NAMESPACE_ATOM_10]['uri'][0]));
2533
            }
2534
            if (isset($contributor['child'][self::NAMESPACE_ATOM_10]['email'][0]['data'])) {
2535
                $email = $this->sanitize($contributor['child'][self::NAMESPACE_ATOM_10]['email'][0]['data'], self::CONSTRUCT_TEXT);
2536
            }
2537
            if ($name !== null || $email !== null || $uri !== null) {
2538
                $contributors[] = $this->registry->create(Author::class, [$name, $uri, $email]);
2539
            }
2540
        }
2541
        foreach ((array) $this->get_channel_tags(self::NAMESPACE_ATOM_03, 'contributor') as $contributor) {
2542
            $name = null;
2543
            $url = null;
2544
            $email = null;
2545
            if (isset($contributor['child'][self::NAMESPACE_ATOM_03]['name'][0]['data'])) {
2546
                $name = $this->sanitize($contributor['child'][self::NAMESPACE_ATOM_03]['name'][0]['data'], self::CONSTRUCT_TEXT);
2547
            }
2548
            if (isset($contributor['child'][self::NAMESPACE_ATOM_03]['url'][0]['data'])) {
2549
                $url = $this->sanitize($contributor['child'][self::NAMESPACE_ATOM_03]['url'][0]['data'], self::CONSTRUCT_IRI, $this->get_base($contributor['child'][self::NAMESPACE_ATOM_03]['url'][0]));
2550
            }
2551
            if (isset($contributor['child'][self::NAMESPACE_ATOM_03]['email'][0]['data'])) {
2552
                $email = $this->sanitize($contributor['child'][self::NAMESPACE_ATOM_03]['email'][0]['data'], self::CONSTRUCT_TEXT);
2553
            }
2554
            if ($name !== null || $email !== null || $url !== null) {
2555
                $contributors[] = $this->registry->create(Author::class, [$name, $url, $email]);
2556
            }
2557
        }
2558
 
2559
        if (!empty($contributors)) {
2560
            return array_unique($contributors);
2561
        }
2562
 
2563
        return null;
2564
    }
2565
 
2566
    /**
2567
     * Get a single link for the feed
2568
     *
2569
     * @since 1.0 (previously called `get_feed_link` since Preview Release, `get_feed_permalink()` since 0.8)
2570
     * @param int $key The link that you want to return. Remember that arrays begin with 0, not 1
2571
     * @param string $rel The relationship of the link to return
2572
     * @return string|null Link URL
2573
     */
2574
    public function get_link($key = 0, $rel = 'alternate')
2575
    {
2576
        $links = $this->get_links($rel);
2577
        if (isset($links[$key])) {
2578
            return $links[$key];
2579
        }
2580
 
2581
        return null;
2582
    }
2583
 
2584
    /**
2585
     * Get the permalink for the item
2586
     *
2587
     * Returns the first link available with a relationship of "alternate".
2588
     * Identical to {@see get_link()} with key 0
2589
     *
2590
     * @see get_link
2591
     * @since 1.0 (previously called `get_feed_link` since Preview Release, `get_feed_permalink()` since 0.8)
2592
     * @internal Added for parity between the parent-level and the item/entry-level.
2593
     * @return string|null Link URL
2594
     */
2595
    public function get_permalink()
2596
    {
2597
        return $this->get_link(0);
2598
    }
2599
 
2600
    /**
2601
     * Get all links for the feed
2602
     *
2603
     * Uses `<atom:link>` or `<link>`
2604
     *
2605
     * @since Beta 2
2606
     * @param string $rel The relationship of links to return
2607
     * @return array|null Links found for the feed (strings)
2608
     */
2609
    public function get_links($rel = 'alternate')
2610
    {
2611
        if (!isset($this->data['links'])) {
2612
            $this->data['links'] = [];
2613
            if ($links = $this->get_channel_tags(self::NAMESPACE_ATOM_10, 'link')) {
2614
                foreach ($links as $link) {
2615
                    if (isset($link['attribs']['']['href'])) {
2616
                        $link_rel = (isset($link['attribs']['']['rel'])) ? $link['attribs']['']['rel'] : 'alternate';
2617
                        $this->data['links'][$link_rel][] = $this->sanitize($link['attribs']['']['href'], self::CONSTRUCT_IRI, $this->get_base($link));
2618
                    }
2619
                }
2620
            }
2621
            if ($links = $this->get_channel_tags(self::NAMESPACE_ATOM_03, 'link')) {
2622
                foreach ($links as $link) {
2623
                    if (isset($link['attribs']['']['href'])) {
2624
                        $link_rel = (isset($link['attribs']['']['rel'])) ? $link['attribs']['']['rel'] : 'alternate';
2625
                        $this->data['links'][$link_rel][] = $this->sanitize($link['attribs']['']['href'], self::CONSTRUCT_IRI, $this->get_base($link));
2626
                    }
2627
                }
2628
            }
2629
            if ($links = $this->get_channel_tags(self::NAMESPACE_RSS_10, 'link')) {
2630
                $this->data['links']['alternate'][] = $this->sanitize($links[0]['data'], self::CONSTRUCT_IRI, $this->get_base($links[0]));
2631
            }
2632
            if ($links = $this->get_channel_tags(self::NAMESPACE_RSS_090, 'link')) {
2633
                $this->data['links']['alternate'][] = $this->sanitize($links[0]['data'], self::CONSTRUCT_IRI, $this->get_base($links[0]));
2634
            }
2635
            if ($links = $this->get_channel_tags(self::NAMESPACE_RSS_20, 'link')) {
2636
                $this->data['links']['alternate'][] = $this->sanitize($links[0]['data'], self::CONSTRUCT_IRI, $this->get_base($links[0]));
2637
            }
2638
 
2639
            $keys = array_keys($this->data['links']);
2640
            foreach ($keys as $key) {
2641
                if ($this->registry->call(Misc::class, 'is_isegment_nz_nc', [$key])) {
2642
                    if (isset($this->data['links'][self::IANA_LINK_RELATIONS_REGISTRY . $key])) {
2643
                        $this->data['links'][self::IANA_LINK_RELATIONS_REGISTRY . $key] = array_merge($this->data['links'][$key], $this->data['links'][self::IANA_LINK_RELATIONS_REGISTRY . $key]);
2644
                        $this->data['links'][$key] =& $this->data['links'][self::IANA_LINK_RELATIONS_REGISTRY . $key];
2645
                    } else {
2646
                        $this->data['links'][self::IANA_LINK_RELATIONS_REGISTRY . $key] =& $this->data['links'][$key];
2647
                    }
2648
                } elseif (substr($key, 0, 41) === self::IANA_LINK_RELATIONS_REGISTRY) {
2649
                    $this->data['links'][substr($key, 41)] =& $this->data['links'][$key];
2650
                }
2651
                $this->data['links'][$key] = array_unique($this->data['links'][$key]);
2652
            }
2653
        }
2654
 
2655
        if (isset($this->data['headers']['link'])) {
2656
            $link_headers = $this->data['headers']['link'];
2657
            if (is_array($link_headers)) {
2658
                $link_headers = implode(',', $link_headers);
2659
            }
2660
            // https://datatracker.ietf.org/doc/html/rfc8288
2661
            if (is_string($link_headers) &&
2662
                preg_match_all('/<(?P<uri>[^>]+)>\s*;\s*rel\s*=\s*(?P<quote>"?)' . preg_quote($rel) . '(?P=quote)\s*(?=,|$)/i', $link_headers, $matches)) {
2663
                return $matches['uri'];
2664
            }
2665
        }
2666
 
2667
        if (isset($this->data['links'][$rel])) {
2668
            return $this->data['links'][$rel];
2669
        }
2670
 
2671
        return null;
2672
    }
2673
 
2674
    public function get_all_discovered_feeds()
2675
    {
2676
        return $this->all_discovered_feeds;
2677
    }
2678
 
2679
    /**
2680
     * Get the content for the item
2681
     *
2682
     * Uses `<atom:subtitle>`, `<atom:tagline>`, `<description>`,
2683
     * `<dc:description>`, `<itunes:summary>` or `<itunes:subtitle>`
2684
     *
2685
     * @since 1.0 (previously called `get_feed_description()` since 0.8)
2686
     * @return string|null
2687
     */
2688
    public function get_description()
2689
    {
2690
        if ($return = $this->get_channel_tags(self::NAMESPACE_ATOM_10, 'subtitle')) {
2691
            return $this->sanitize($return[0]['data'], $this->registry->call(Misc::class, 'atom_10_construct_type', [$return[0]['attribs']]), $this->get_base($return[0]));
2692
        } elseif ($return = $this->get_channel_tags(self::NAMESPACE_ATOM_03, 'tagline')) {
2693
            return $this->sanitize($return[0]['data'], $this->registry->call(Misc::class, 'atom_03_construct_type', [$return[0]['attribs']]), $this->get_base($return[0]));
2694
        } elseif ($return = $this->get_channel_tags(self::NAMESPACE_RSS_10, 'description')) {
2695
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_MAYBE_HTML, $this->get_base($return[0]));
2696
        } elseif ($return = $this->get_channel_tags(self::NAMESPACE_RSS_090, 'description')) {
2697
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_MAYBE_HTML, $this->get_base($return[0]));
2698
        } elseif ($return = $this->get_channel_tags(self::NAMESPACE_RSS_20, 'description')) {
2699
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_HTML, $this->get_base($return[0]));
2700
        } elseif ($return = $this->get_channel_tags(self::NAMESPACE_DC_11, 'description')) {
2701
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_TEXT);
2702
        } elseif ($return = $this->get_channel_tags(self::NAMESPACE_DC_10, 'description')) {
2703
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_TEXT);
2704
        } elseif ($return = $this->get_channel_tags(self::NAMESPACE_ITUNES, 'summary')) {
2705
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_HTML, $this->get_base($return[0]));
2706
        } elseif ($return = $this->get_channel_tags(self::NAMESPACE_ITUNES, 'subtitle')) {
2707
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_HTML, $this->get_base($return[0]));
2708
        }
2709
 
2710
        return null;
2711
    }
2712
 
2713
    /**
2714
     * Get the copyright info for the feed
2715
     *
2716
     * Uses `<atom:rights>`, `<atom:copyright>` or `<dc:rights>`
2717
     *
2718
     * @since 1.0 (previously called `get_feed_copyright()` since 0.8)
2719
     * @return string|null
2720
     */
2721
    public function get_copyright()
2722
    {
2723
        if ($return = $this->get_channel_tags(self::NAMESPACE_ATOM_10, 'rights')) {
2724
            return $this->sanitize($return[0]['data'], $this->registry->call(Misc::class, 'atom_10_construct_type', [$return[0]['attribs']]), $this->get_base($return[0]));
2725
        } elseif ($return = $this->get_channel_tags(self::NAMESPACE_ATOM_03, 'copyright')) {
2726
            return $this->sanitize($return[0]['data'], $this->registry->call(Misc::class, 'atom_03_construct_type', [$return[0]['attribs']]), $this->get_base($return[0]));
2727
        } elseif ($return = $this->get_channel_tags(self::NAMESPACE_RSS_20, 'copyright')) {
2728
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_TEXT);
2729
        } elseif ($return = $this->get_channel_tags(self::NAMESPACE_DC_11, 'rights')) {
2730
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_TEXT);
2731
        } elseif ($return = $this->get_channel_tags(self::NAMESPACE_DC_10, 'rights')) {
2732
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_TEXT);
2733
        }
2734
 
2735
        return null;
2736
    }
2737
 
2738
    /**
2739
     * Get the language for the feed
2740
     *
2741
     * Uses `<language>`, `<dc:language>`, or @xml_lang
2742
     *
2743
     * @since 1.0 (previously called `get_feed_language()` since 0.8)
2744
     * @return string|null
2745
     */
2746
    public function get_language()
2747
    {
2748
        if ($return = $this->get_channel_tags(self::NAMESPACE_RSS_20, 'language')) {
2749
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_TEXT);
2750
        } elseif ($return = $this->get_channel_tags(self::NAMESPACE_DC_11, 'language')) {
2751
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_TEXT);
2752
        } elseif ($return = $this->get_channel_tags(self::NAMESPACE_DC_10, 'language')) {
2753
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_TEXT);
2754
        } elseif (isset($this->data['child'][self::NAMESPACE_ATOM_10]['feed'][0]['xml_lang'])) {
2755
            return $this->sanitize($this->data['child'][self::NAMESPACE_ATOM_10]['feed'][0]['xml_lang'], self::CONSTRUCT_TEXT);
2756
        } elseif (isset($this->data['child'][self::NAMESPACE_ATOM_03]['feed'][0]['xml_lang'])) {
2757
            return $this->sanitize($this->data['child'][self::NAMESPACE_ATOM_03]['feed'][0]['xml_lang'], self::CONSTRUCT_TEXT);
2758
        } elseif (isset($this->data['child'][self::NAMESPACE_RDF]['RDF'][0]['xml_lang'])) {
2759
            return $this->sanitize($this->data['child'][self::NAMESPACE_RDF]['RDF'][0]['xml_lang'], self::CONSTRUCT_TEXT);
2760
        } elseif (isset($this->data['headers']['content-language'])) {
2761
            return $this->sanitize($this->data['headers']['content-language'], self::CONSTRUCT_TEXT);
2762
        }
2763
 
2764
        return null;
2765
    }
2766
 
2767
    /**
2768
     * Get the latitude coordinates for the item
2769
     *
2770
     * Compatible with the W3C WGS84 Basic Geo and GeoRSS specifications
2771
     *
2772
     * Uses `<geo:lat>` or `<georss:point>`
2773
     *
2774
     * @since 1.0
2775
     * @link http://www.w3.org/2003/01/geo/ W3C WGS84 Basic Geo
2776
     * @link http://www.georss.org/ GeoRSS
2777
     * @return string|null
2778
     */
2779
    public function get_latitude()
2780
    {
2781
        if ($return = $this->get_channel_tags(self::NAMESPACE_W3C_BASIC_GEO, 'lat')) {
2782
            return (float) $return[0]['data'];
2783
        } elseif (($return = $this->get_channel_tags(self::NAMESPACE_GEORSS, 'point')) && preg_match('/^((?:-)?[0-9]+(?:\.[0-9]+)) ((?:-)?[0-9]+(?:\.[0-9]+))$/', trim($return[0]['data']), $match)) {
2784
            return (float) $match[1];
2785
        }
2786
 
2787
        return null;
2788
    }
2789
 
2790
    /**
2791
     * Get the longitude coordinates for the feed
2792
     *
2793
     * Compatible with the W3C WGS84 Basic Geo and GeoRSS specifications
2794
     *
2795
     * Uses `<geo:long>`, `<geo:lon>` or `<georss:point>`
2796
     *
2797
     * @since 1.0
2798
     * @link http://www.w3.org/2003/01/geo/ W3C WGS84 Basic Geo
2799
     * @link http://www.georss.org/ GeoRSS
2800
     * @return string|null
2801
     */
2802
    public function get_longitude()
2803
    {
2804
        if ($return = $this->get_channel_tags(self::NAMESPACE_W3C_BASIC_GEO, 'long')) {
2805
            return (float) $return[0]['data'];
2806
        } elseif ($return = $this->get_channel_tags(self::NAMESPACE_W3C_BASIC_GEO, 'lon')) {
2807
            return (float) $return[0]['data'];
2808
        } elseif (($return = $this->get_channel_tags(self::NAMESPACE_GEORSS, 'point')) && preg_match('/^((?:-)?[0-9]+(?:\.[0-9]+)) ((?:-)?[0-9]+(?:\.[0-9]+))$/', trim($return[0]['data']), $match)) {
2809
            return (float) $match[2];
2810
        }
2811
 
2812
        return null;
2813
    }
2814
 
2815
    /**
2816
     * Get the feed logo's title
2817
     *
2818
     * RSS 0.9.0, 1.0 and 2.0 feeds are allowed to have a "feed logo" title.
2819
     *
2820
     * Uses `<image><title>` or `<image><dc:title>`
2821
     *
2822
     * @return string|null
2823
     */
2824
    public function get_image_title()
2825
    {
2826
        if ($return = $this->get_image_tags(self::NAMESPACE_RSS_10, 'title')) {
2827
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_TEXT);
2828
        } elseif ($return = $this->get_image_tags(self::NAMESPACE_RSS_090, 'title')) {
2829
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_TEXT);
2830
        } elseif ($return = $this->get_image_tags(self::NAMESPACE_RSS_20, 'title')) {
2831
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_TEXT);
2832
        } elseif ($return = $this->get_image_tags(self::NAMESPACE_DC_11, 'title')) {
2833
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_TEXT);
2834
        } elseif ($return = $this->get_image_tags(self::NAMESPACE_DC_10, 'title')) {
2835
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_TEXT);
2836
        }
2837
 
2838
        return null;
2839
    }
2840
 
2841
    /**
2842
     * Get the feed logo's URL
2843
     *
2844
     * RSS 0.9.0, 2.0, Atom 1.0, and feeds with iTunes RSS tags are allowed to
2845
     * have a "feed logo" URL. This points directly to the image itself.
2846
     *
2847
     * Uses `<itunes:image>`, `<atom:logo>`, `<atom:icon>`,
2848
     * `<image><title>` or `<image><dc:title>`
2849
     *
2850
     * @return string|null
2851
     */
2852
    public function get_image_url()
2853
    {
2854
        if ($return = $this->get_channel_tags(self::NAMESPACE_ITUNES, 'image')) {
2855
            return $this->sanitize($return[0]['attribs']['']['href'], self::CONSTRUCT_IRI);
2856
        } elseif ($return = $this->get_channel_tags(self::NAMESPACE_ATOM_10, 'logo')) {
2857
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_IRI, $this->get_base($return[0]));
2858
        } elseif ($return = $this->get_channel_tags(self::NAMESPACE_ATOM_10, 'icon')) {
2859
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_IRI, $this->get_base($return[0]));
2860
        } elseif ($return = $this->get_image_tags(self::NAMESPACE_RSS_10, 'url')) {
2861
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_IRI, $this->get_base($return[0]));
2862
        } elseif ($return = $this->get_image_tags(self::NAMESPACE_RSS_090, 'url')) {
2863
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_IRI, $this->get_base($return[0]));
2864
        } elseif ($return = $this->get_image_tags(self::NAMESPACE_RSS_20, 'url')) {
2865
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_IRI, $this->get_base($return[0]));
2866
        }
2867
 
2868
        return null;
2869
    }
2870
 
2871
 
2872
    /**
2873
     * Get the feed logo's link
2874
     *
2875
     * RSS 0.9.0, 1.0 and 2.0 feeds are allowed to have a "feed logo" link. This
2876
     * points to a human-readable page that the image should link to.
2877
     *
2878
     * Uses `<itunes:image>`, `<atom:logo>`, `<atom:icon>`,
2879
     * `<image><title>` or `<image><dc:title>`
2880
     *
2881
     * @return string|null
2882
     */
2883
    public function get_image_link()
2884
    {
2885
        if ($return = $this->get_image_tags(self::NAMESPACE_RSS_10, 'link')) {
2886
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_IRI, $this->get_base($return[0]));
2887
        } elseif ($return = $this->get_image_tags(self::NAMESPACE_RSS_090, 'link')) {
2888
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_IRI, $this->get_base($return[0]));
2889
        } elseif ($return = $this->get_image_tags(self::NAMESPACE_RSS_20, 'link')) {
2890
            return $this->sanitize($return[0]['data'], self::CONSTRUCT_IRI, $this->get_base($return[0]));
2891
        }
2892
 
2893
        return null;
2894
    }
2895
 
2896
    /**
2897
     * Get the feed logo's link
2898
     *
2899
     * RSS 2.0 feeds are allowed to have a "feed logo" width.
2900
     *
2901
     * Uses `<image><width>` or defaults to 88 if no width is specified and
2902
     * the feed is an RSS 2.0 feed.
2903
     *
2904
     * @return int|null
2905
     */
2906
    public function get_image_width()
2907
    {
2908
        if ($return = $this->get_image_tags(self::NAMESPACE_RSS_20, 'width')) {
2909
            return intval($return[0]['data']);
2910
        } elseif ($this->get_type() & self::TYPE_RSS_SYNDICATION && $this->get_image_tags(self::NAMESPACE_RSS_20, 'url')) {
2911
            return 88;
2912
        }
2913
 
2914
        return null;
2915
    }
2916
 
2917
    /**
2918
     * Get the feed logo's height
2919
     *
2920
     * RSS 2.0 feeds are allowed to have a "feed logo" height.
2921
     *
2922
     * Uses `<image><height>` or defaults to 31 if no height is specified and
2923
     * the feed is an RSS 2.0 feed.
2924
     *
2925
     * @return int|null
2926
     */
2927
    public function get_image_height()
2928
    {
2929
        if ($return = $this->get_image_tags(self::NAMESPACE_RSS_20, 'height')) {
2930
            return intval($return[0]['data']);
2931
        } elseif ($this->get_type() & self::TYPE_RSS_SYNDICATION && $this->get_image_tags(self::NAMESPACE_RSS_20, 'url')) {
2932
            return 31;
2933
        }
2934
 
2935
        return null;
2936
    }
2937
 
2938
    /**
2939
     * Get the number of items in the feed
2940
     *
2941
     * This is well-suited for {@link http://php.net/for for()} loops with
2942
     * {@see get_item()}
2943
     *
2944
     * @param int $max Maximum value to return. 0 for no limit
2945
     * @return int Number of items in the feed
2946
     */
2947
    public function get_item_quantity($max = 0)
2948
    {
2949
        $max = (int) $max;
2950
        $qty = count($this->get_items());
2951
        if ($max === 0) {
2952
            return $qty;
2953
        }
2954
 
2955
        return ($qty > $max) ? $max : $qty;
2956
    }
2957
 
2958
    /**
2959
     * Get a single item from the feed
2960
     *
2961
     * This is better suited for {@link http://php.net/for for()} loops, whereas
2962
     * {@see get_items()} is better suited for
2963
     * {@link http://php.net/foreach foreach()} loops.
2964
     *
2965
     * @see get_item_quantity()
2966
     * @since Beta 2
2967
     * @param int $key The item that you want to return. Remember that arrays begin with 0, not 1
2968
     * @return \SimplePie\Item|null
2969
     */
2970
    public function get_item($key = 0)
2971
    {
2972
        $items = $this->get_items();
2973
        if (isset($items[$key])) {
2974
            return $items[$key];
2975
        }
2976
 
2977
        return null;
2978
    }
2979
 
2980
    /**
2981
     * Get all items from the feed
2982
     *
2983
     * This is better suited for {@link http://php.net/for for()} loops, whereas
2984
     * {@see get_items()} is better suited for
2985
     * {@link http://php.net/foreach foreach()} loops.
2986
     *
2987
     * @see get_item_quantity
2988
     * @since Beta 2
2989
     * @param int $start Index to start at
2990
     * @param int $end Number of items to return. 0 for all items after `$start`
2991
     * @return \SimplePie\Item[]|null List of {@see \SimplePie\Item} objects
2992
     */
2993
    public function get_items($start = 0, $end = 0)
2994
    {
2995
        if (!isset($this->data['items'])) {
2996
            if (!empty($this->multifeed_objects)) {
2997
                $this->data['items'] = SimplePie::merge_items($this->multifeed_objects, $start, $end, $this->item_limit);
2998
                if (empty($this->data['items'])) {
2999
                    return [];
3000
                }
3001
                return $this->data['items'];
3002
            }
3003
            $this->data['items'] = [];
3004
            if ($items = $this->get_feed_tags(self::NAMESPACE_ATOM_10, 'entry')) {
3005
                $keys = array_keys($items);
3006
                foreach ($keys as $key) {
3007
                    $this->data['items'][] = $this->registry->create(Item::class, [$this, $items[$key]]);
3008
                }
3009
            }
3010
            if ($items = $this->get_feed_tags(self::NAMESPACE_ATOM_03, 'entry')) {
3011
                $keys = array_keys($items);
3012
                foreach ($keys as $key) {
3013
                    $this->data['items'][] = $this->registry->create(Item::class, [$this, $items[$key]]);
3014
                }
3015
            }
3016
            if ($items = $this->get_feed_tags(self::NAMESPACE_RSS_10, 'item')) {
3017
                $keys = array_keys($items);
3018
                foreach ($keys as $key) {
3019
                    $this->data['items'][] = $this->registry->create(Item::class, [$this, $items[$key]]);
3020
                }
3021
            }
3022
            if ($items = $this->get_feed_tags(self::NAMESPACE_RSS_090, 'item')) {
3023
                $keys = array_keys($items);
3024
                foreach ($keys as $key) {
3025
                    $this->data['items'][] = $this->registry->create(Item::class, [$this, $items[$key]]);
3026
                }
3027
            }
3028
            if ($items = $this->get_channel_tags(self::NAMESPACE_RSS_20, 'item')) {
3029
                $keys = array_keys($items);
3030
                foreach ($keys as $key) {
3031
                    $this->data['items'][] = $this->registry->create(Item::class, [$this, $items[$key]]);
3032
                }
3033
            }
3034
        }
3035
 
3036
        if (empty($this->data['items'])) {
3037
            return [];
3038
        }
3039
 
3040
        if ($this->order_by_date) {
3041
            if (!isset($this->data['ordered_items'])) {
3042
                $this->data['ordered_items'] = $this->data['items'];
3043
                usort($this->data['ordered_items'], [get_class($this), 'sort_items']);
3044
            }
3045
            $items = $this->data['ordered_items'];
3046
        } else {
3047
            $items = $this->data['items'];
3048
        }
3049
        // Slice the data as desired
3050
        if ($end === 0) {
3051
            return array_slice($items, $start);
3052
        }
3053
 
3054
        return array_slice($items, $start, $end);
3055
    }
3056
 
3057
    /**
3058
     * Set the favicon handler
3059
     *
3060
     * @deprecated Use your own favicon handling instead
3061
     */
3062
    public function set_favicon_handler($page = false, $qs = 'i')
3063
    {
3064
        trigger_error('Favicon handling has been removed, please use your own handling', \E_USER_DEPRECATED);
3065
        return false;
3066
    }
3067
 
3068
    /**
3069
     * Get the favicon for the current feed
3070
     *
3071
     * @deprecated Use your own favicon handling instead
3072
     */
3073
    public function get_favicon()
3074
    {
3075
        trigger_error('Favicon handling has been removed, please use your own handling', \E_USER_DEPRECATED);
3076
 
3077
        if (($url = $this->get_link()) !== null) {
3078
            return 'https://www.google.com/s2/favicons?domain=' . urlencode($url);
3079
        }
3080
 
3081
        return false;
3082
    }
3083
 
3084
    /**
3085
     * Magic method handler
3086
     *
3087
     * @param string $method Method name
3088
     * @param array $args Arguments to the method
3089
     * @return mixed
3090
     */
3091
    public function __call($method, $args)
3092
    {
3093
        if (strpos($method, 'subscribe_') === 0) {
3094
            trigger_error('subscribe_*() has been deprecated, implement the callback yourself', \E_USER_DEPRECATED);
3095
            return '';
3096
        }
3097
        if ($method === 'enable_xml_dump') {
3098
            trigger_error('enable_xml_dump() has been deprecated, use get_raw_data() instead', \E_USER_DEPRECATED);
3099
            return false;
3100
        }
3101
 
3102
        $class = get_class($this);
3103
        $trace = debug_backtrace();
3104
        $file = $trace[0]['file'];
3105
        $line = $trace[0]['line'];
3106
        trigger_error("Call to undefined method $class::$method() in $file on line $line", E_USER_ERROR);
3107
    }
3108
 
3109
    /**
3110
     * Sorting callback for items
3111
     *
3112
     * @access private
3113
     * @param SimplePie $a
3114
     * @param SimplePie $b
3115
     * @return boolean
3116
     */
3117
    public static function sort_items($a, $b)
3118
    {
3119
        $a_date = $a->get_date('U');
3120
        $b_date = $b->get_date('U');
3121
        if ($a_date && $b_date) {
3122
            return $a_date > $b_date ? -1 : 1;
3123
        }
3124
        // Sort items without dates to the top.
3125
        if ($a_date) {
3126
            return 1;
3127
        }
3128
        if ($b_date) {
3129
            return -1;
3130
        }
3131
        return 0;
3132
    }
3133
 
3134
    /**
3135
     * Merge items from several feeds into one
3136
     *
3137
     * If you're merging multiple feeds together, they need to all have dates
3138
     * for the items or else SimplePie will refuse to sort them.
3139
     *
3140
     * @link http://simplepie.org/wiki/tutorial/sort_multiple_feeds_by_time_and_date#if_feeds_require_separate_per-feed_settings
3141
     * @param array $urls List of SimplePie feed objects to merge
3142
     * @param int $start Starting item
3143
     * @param int $end Number of items to return
3144
     * @param int $limit Maximum number of items per feed
3145
     * @return array
3146
     */
3147
    public static function merge_items($urls, $start = 0, $end = 0, $limit = 0)
3148
    {
3149
        if (is_array($urls) && sizeof($urls) > 0) {
3150
            $items = [];
3151
            foreach ($urls as $arg) {
3152
                if ($arg instanceof SimplePie) {
3153
                    $items = array_merge($items, $arg->get_items(0, $limit));
3154
                } else {
3155
                    trigger_error('Arguments must be SimplePie objects', E_USER_WARNING);
3156
                }
3157
            }
3158
 
3159
            usort($items, [get_class($urls[0]), 'sort_items']);
3160
 
3161
            if ($end === 0) {
3162
                return array_slice($items, $start);
3163
            }
3164
 
3165
            return array_slice($items, $start, $end);
3166
        }
3167
 
3168
        trigger_error('Cannot merge zero SimplePie objects', E_USER_WARNING);
3169
        return [];
3170
    }
3171
 
3172
    /**
3173
     * Store PubSubHubbub links as headers
3174
     *
3175
     * There is no way to find PuSH links in the body of a microformats feed,
3176
     * so they are added to the headers when found, to be used later by get_links.
3177
     * @param \SimplePie\File $file
3178
     * @param string $hub
3179
     * @param string $self
3180
     */
3181
    private function store_links(&$file, $hub, $self)
3182
    {
3183
        if (isset($file->headers['link']['hub']) ||
3184
              (isset($file->headers['link']) &&
3185
               preg_match('/rel=hub/', $file->headers['link']))) {
3186
            return;
3187
        }
3188
 
3189
        if ($hub) {
3190
            if (isset($file->headers['link'])) {
3191
                if ($file->headers['link'] !== '') {
3192
                    $file->headers['link'] = ', ';
3193
                }
3194
            } else {
3195
                $file->headers['link'] = '';
3196
            }
3197
            $file->headers['link'] .= '<'.$hub.'>; rel=hub';
3198
            if ($self) {
3199
                $file->headers['link'] .= ', <'.$self.'>; rel=self';
3200
            }
3201
        }
3202
    }
3203
 
3204
    /**
3205
     * Get a DataCache
3206
     *
3207
     * @param string $feed_url Only needed for BC, can be removed in SimplePie 2.0.0
3208
     *
3209
     * @return DataCache
3210
     */
3211
    private function get_cache($feed_url = '')
3212
    {
3213
        if ($this->cache === null) {
3214
            // @trigger_error(sprintf('Not providing as PSR-16 cache implementation is deprecated since SimplePie 1.8.0, please use "SimplePie\SimplePie::set_cache()".'), \E_USER_DEPRECATED);
3215
            $cache = $this->registry->call(Cache::class, 'get_handler', [
3216
                $this->cache_location,
3217
                $this->get_cache_filename($feed_url),
3218
                Base::TYPE_FEED
3219
            ]);
3220
 
3221
            return new BaseDataCache($cache);
3222
        }
3223
 
3224
        return $this->cache;
3225
    }
3226
}
3227
 
3228
class_alias('SimplePie\SimplePie', 'SimplePie');