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<?php// This file is part of Moodle - http://moodle.org///// Moodle is free software: you can redistribute it and/or modify// it under the terms of the GNU General Public License as published by// the Free Software Foundation, either version 3 of the License, or// (at your option) any later version.//// Moodle is distributed in the hope that it will be useful,// but WITHOUT ANY WARRANTY; without even the implied warranty of// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the// GNU General Public License for more details.//// You should have received a copy of the GNU General Public License// along with Moodle. If not, see <http://www.gnu.org/licenses/>./*** About validateUrlSyntax():* This function will verify if a http URL is formatted properly, returning* either with true or false.** I used rfc #2396 URI: Generic Syntax as my guide when creating the* regular expression. For all the details see the comments below.** Usage:* validateUrlSyntax( url_to_check[, options])** url_to_check - string - The url to check** options - string - A optional string of options to set which parts of* the url are required, optional, or not allowed. Each option* must be followed by a "+" for required, "?" for optional, or* "-" for not allowed.** s - Scheme. Allows "+?-", defaults to "s?"* H - http:// Allows "+?-", defaults to "H?"* S - https:// (SSL). Allows "+?-", defaults to "S?"* E - mailto: (email). Allows "+?-", defaults to "E-"* F - ftp:// Allows "+?-", defaults to "F-"* Dependant on scheme being enabled* u - User section. Allows "+?-", defaults to "u?"* P - Password in user section. Allows "+?-", defaults to "P?"* Dependant on user section being enabled* a - Address (ip or domain). Allows "+?-", defaults to "a+"* I - Ip address. Allows "+?-", defaults to "I?"* If I+, then domains are disabled* If I-, then domains are required* Dependant on address being enabled* p - Port number. Allows "+?-", defaults to "p?"* f - File path. Allows "+?-", defaults to "f?"* q - Query section. Allows "+?-", defaults to "q?"* r - Fragment (anchor). Allows "+?-", defaults to "r?"** Paste the funtion code, or include_once() this template at the top of the page* you wish to use this function.*** Examples:* <code>* validateUrlSyntax('http://george@www.cnn.com/#top')** validateUrlSyntax('https://games.yahoo.com:8080/board/chess.htm?move=true')** validateUrlSyntax('http://www.hotmail.com/', 's+u-I-p-q-r-')** validateUrlSyntax('/directory/file.php#top', 's-u-a-p-f+')*** if (validateUrlSyntax('http://www.canowhoopass.com/', 'u-'))* {* echo 'URL SYNTAX IS VERIFIED';* } else {* echo 'URL SYNTAX IS ILLEGAL';* }* </code>** Last Edited:* June 15th 2017*** Changelog:* June 15th 2017 by Moodle.* -Added rtmp:// option.** December 15th 2004* -Added new TLD's - .jobs, .mobi, .post and .travel. They are official, but not yet active.** August 31th 2004* -Fixed bug allowing empty username even when it was required* -Changed and added a few options to add extra schemes* -Added mailto: ftp:// and http:// options* -https option was 'l' now it is 'S' (capital)* -Added password option. Now passwords can be disabled while usernames are ok (for email)* -IP Address option was 'i' now it is 'I' (capital)* -Options are now case sensitive* -Added validateEmailSyntax() and validateFtpSyntax() functions below<br>** August 27th, 2004* -IP group range is more specific. Used to allow 0-299. Now it is 0-255* -Port range more specific. Used to allow 0-69999. Now it is 0-65535<br>* -Fixed bug disallowing 'i-' option.<br>* -Changed license to GPL** July 8th, 2004* -Fixed bug disallowing 'l-' option. Thanks Dr. Cheap** June 15, 2004* -Added options parameter to make it easier for people to plug the function in* without needed to rework the code.* -Split the example application away from the function** June 1, 2004* -Complete rewrite* -Now more modular* -Easier to disable sections* -Easier to port to other languages* -Easier to port to verify email addresses* -Uses only simple regular expressions so it is more portable* -Follows RFC closer for domain names. Some "play" domains may break* -Renamed from 'verifyUrl()' to 'validateUrlSyntax()'* -Removed extra code which added 'http://' and trailing '/' if it was missing* -That code was better suited for a massaging function, not verifying* -Bug fixes:* -Now splits up and forces '/path?query#fragment' order* -No longer requires a path when using a query or fragment** August 29, 2003* -Allowed port numbers above 9999. Now allows up to 69999** Sometime, 2002* -Added new top level domains* -aero, coop, museum, name, info, biz, pro** October 5, 2000* -First Version*** Intentional Limitations:* -Does not verify url actually exists. Only validates the syntax* -Strictly follows the RFC standards. Some urls exist in the wild which will* not validate. Including ones with square brackets in the query section '[]'*** Known Problems:* -None at this time*** Author(s):* Rod Apeldoorn - rod(at)canowhoopass(dot)com*** Homepage:* http://www.canowhoopass.com/*** Thanks!:* -WEAV -Several members of Weav helped to test - http://weav.bc.ca/* -There were also a number of emails from other developers expressing* thanks and suggestions. It is nice to be appreciated. Thanks!** Alternate Commercial Licenses:* For information in regards to alternate licensing, contact me.** @package moodlecore* @copyright Copyright 2004, Rod Apeldoorn {@link http://www.canowhoopass.com/}* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later*//*** BEGINNING OF validateUrlSyntax() function*/function validateUrlSyntax( $urladdr, $options="" ){// Force Options parameter to be lower case// DISABLED PERMAMENTLY - OK to remove from code// $options = strtolower($options);// Check Options Parameterif (!preg_match( '/^([sHSEFRuPaIpfqr][+?-])*$/', $options )){trigger_error("Options attribute malformed", E_USER_ERROR);}// Set Options Array, set defaults if options are not specified// Schemeif (strpos( $options, 's') === false) $aOptions['s'] = '?';else $aOptions['s'] = substr( $options, strpos( $options, 's') + 1, 1);// http://if (strpos( $options, 'H') === false) $aOptions['H'] = '?';else $aOptions['H'] = substr( $options, strpos( $options, 'H') + 1, 1);// https:// (SSL)if (strpos( $options, 'S') === false) $aOptions['S'] = '?';else $aOptions['S'] = substr( $options, strpos( $options, 'S') + 1, 1);// mailto: (email)if (strpos( $options, 'E') === false) $aOptions['E'] = '-';else $aOptions['E'] = substr( $options, strpos( $options, 'E') + 1, 1);// ftp://if (strpos( $options, 'F') === false) $aOptions['F'] = '-';else $aOptions['F'] = substr( $options, strpos( $options, 'F') + 1, 1);// rtmp://if (strpos( $options, 'R') === false) $aOptions['R'] = '-';else $aOptions['R'] = substr( $options, strpos( $options, 'R') + 1, 1);// User sectionif (strpos( $options, 'u') === false) $aOptions['u'] = '?';else $aOptions['u'] = substr( $options, strpos( $options, 'u') + 1, 1);// Password in user sectionif (strpos( $options, 'P') === false) $aOptions['P'] = '?';else $aOptions['P'] = substr( $options, strpos( $options, 'P') + 1, 1);// Address Sectionif (strpos( $options, 'a') === false) $aOptions['a'] = '+';else $aOptions['a'] = substr( $options, strpos( $options, 'a') + 1, 1);// IP Address in address sectionif (strpos( $options, 'I') === false) $aOptions['I'] = '?';else $aOptions['I'] = substr( $options, strpos( $options, 'I') + 1, 1);// Port numberif (strpos( $options, 'p') === false) $aOptions['p'] = '?';else $aOptions['p'] = substr( $options, strpos( $options, 'p') + 1, 1);// File Pathif (strpos( $options, 'f') === false) $aOptions['f'] = '?';else $aOptions['f'] = substr( $options, strpos( $options, 'f') + 1, 1);// Query Sectionif (strpos( $options, 'q') === false) $aOptions['q'] = '?';else $aOptions['q'] = substr( $options, strpos( $options, 'q') + 1, 1);// Fragment (Anchor)if (strpos( $options, 'r') === false) $aOptions['r'] = '?';else $aOptions['r'] = substr( $options, strpos( $options, 'r') + 1, 1);// Loop through options array, to search for and replace "-" to "{0}" and "+" to ""foreach($aOptions as $key => $value){if ($value == '-'){$aOptions[$key] = '{0}';}if ($value == '+'){$aOptions[$key] = '';}}// DEBUGGING - Unescape following line to display to screen current option values// echo '<pre>'; print_r($aOptions); echo '</pre>';// Preset Allowed Characters$alphanum = '[a-zA-Z0-9]'; // Alpha Numeric$unreserved = '[a-zA-Z0-9_.!~*' . '\'' . '()-]';$escaped = '(%[0-9a-fA-F]{2})'; // Escape sequence - In Hex - %6d would be a 'm'$reserved = '[;/?:@&=+$,]'; // Special characters in the URI// Beginning Regular Expression// Scheme - Allows for 'http://', 'https://', 'mailto:', 'ftp://' or 'rtmp://'$scheme = '(';if ($aOptions['H'] === '') { $scheme .= 'http://'; }elseif ($aOptions['S'] === '') { $scheme .= 'https://'; }elseif ($aOptions['E'] === '') { $scheme .= 'mailto:'; }elseif ($aOptions['F'] === '') { $scheme .= 'ftp://'; }elseif ($aOptions['R'] === '') { $scheme .= 'rtmp://'; }else{if ($aOptions['H'] === '?') { $scheme .= '|(http://)'; }if ($aOptions['S'] === '?') { $scheme .= '|(https://)'; }if ($aOptions['E'] === '?') { $scheme .= '|(mailto:)'; }if ($aOptions['F'] === '?') { $scheme .= '|(ftp://)'; }if ($aOptions['R'] === '?') { $scheme .= '|(rtmp://)'; }$scheme = str_replace('(|', '(', $scheme); // fix first pipe}$scheme .= ')' . $aOptions['s'];// End setting scheme// User Info - Allows for 'username@' or 'username:password@'. Note: contrary to rfc, I removed ':' from username section, allowing it only in password.// /---------------- Username -----------------------\ /-------------------------------- Password ------------------------------\$userinfo = '((' . $unreserved . '|' . $escaped . '|[;&=+$,]' . ')+(:(' . $unreserved . '|' . $escaped . '|[;:&=+$,]' . ')+)' . $aOptions['P'] . '@)' . $aOptions['u'];// IP ADDRESS - Allows 0.0.0.0 to 255.255.255.255$ipaddress = '((((2(([0-4][0-9])|(5[0-5])))|([01]?[0-9]?[0-9]))\.){3}((2(([0-4][0-9])|(5[0-5])))|([01]?[0-9]?[0-9])))';// Tertiary Domain(s) - Optional - Multi - Although some sites may use other characters, the RFC says tertiary domains have the same naming restrictions as second level domains$domain_tertiary = '(' . $alphanum . '(([a-zA-Z0-9-]{0,62})' . $alphanum . ')?\.)*';/* MDL-9295 - take out domain_secondary here and below, so that URLs like http://localhost/ and lan addresses like http://host/ are accepted.// Second Level Domain - Required - First and last characters must be Alpha-numeric. Hyphens are allowed inside.$domain_secondary = '(' . $alphanum . '(([a-zA-Z0-9-]{0,62})' . $alphanum . ')?\.)';*/// we want more relaxed URLs in Moodle: MDL-11462// Top Level Domain - First character must be Alpha. Last character must be AlphaNumeric. Hyphens are allowed inside.$domain_toplevel = '([a-zA-Z](([a-zA-Z0-9-]*)[a-zA-Z0-9])?)';/* // Top Level Domain - Required - Domain List Current As Of December 2004. Use above escaped line to be forgiving of possible future TLD's$domain_toplevel = '(aero|biz|com|coop|edu|gov|info|int|jobs|mil|mobi|museum|name|net|org|post|pro|travel|ac|ad|ae|af|ag|ai|al|am|an|ao|aq|ar|as|at|au|aw|az|ax|ba|bb|bd|be|bf|bg|bh|bi|bj|bm|bn|bo|br|bs|bt|bv|bw|by|bz|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|co|cr|cs|cu|cv|cx|cy|cz|de|dj|dk|dm|do|dz|ec|ee|eg|eh|er|es|et|eu|fi|fj|fk|fm|fo|fr|ga|gb|gd|ge|gf|gg|gh|gi|gl|gm|gn|gp|gq|gr|gs|gt|gu|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|im|in|io|iq|ir|is|it|je|jm|jo|jp|ke|kg|kh|ki|km|kn|kp|kr|kw|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|mg|mh|mk|ml|mm|mn|mo|mp|mq|mr|ms|mt|mu|mv|mw|mx|my|mz|na|nc|ne|nf|ng|ni|nl|no|np|nr|nu|nz|om|pa|pe|pf|pg|ph|pk|pl|pm|pn|pr|ps|pt|pw|py|qa|re|ro|ru|rw|sa|sb|sc|sd|se|sg|sh|si|sj|sk|sl|sm|sn|so|sr|st|sv|sy|sz|tc|td|tf|tg|th|tj|tk|tl|tm|tn|to|tp|tr|tt|tv|tw|tz|ua|ug|uk|um|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|ye|yt|yu|za|zm|zw)';*/// Address can be IP address or Domainif ($aOptions['I'] === '{0}') { // IP Address Not Allowed$address = '(' . $domain_tertiary . /* MDL-9295 $domain_secondary . */ $domain_toplevel . ')';} elseif ($aOptions['I'] === '') { // IP Address Required$address = '(' . $ipaddress . ')';} else { // IP Address Optional$address = '((' . $ipaddress . ')|(' . $domain_tertiary . /* MDL-9295 $domain_secondary . */ $domain_toplevel . '))';}$address = $address . $aOptions['a'];// Port Number - :80 or :8080 or :65534 Allows range of :0 to :65535// (0-59999) |(60000-64999) |(65000-65499) |(65500-65529) |(65530-65535)$port_number = '(:(([0-5]?[0-9]{1,4})|(6[0-4][0-9]{3})|(65[0-4][0-9]{2})|(655[0-2][0-9])|(6553[0-5])))' . $aOptions['p'];// Path - Can be as simple as '/' or have multiple folders and filenames$path = '(/((;)?(' . $unreserved . '|' . $escaped . '|' . '[:@&=+$,]' . ')+(/)?)*)' . $aOptions['f'];// Query Section - Accepts ?var1=value1&var2=value2 or ?2393,1221 and much more$querystring = '(\?(' . $reserved . '|' . $unreserved . '|' . $escaped . ')*)' . $aOptions['q'];// Fragment Section - Accepts anchors such as #top$fragment = '(\#(' . $reserved . '|' . $unreserved . '|' . $escaped . ')*)' . $aOptions['r'];// Building Regular Expression$regexp = '#^' . $scheme . $userinfo . $address . $port_number . $path . $querystring . $fragment . '$#i';// DEBUGGING - Uncomment Line Below To Display The Regular Expression Built// echo '<pre>' . htmlentities(wordwrap($regexp,70,"\n",1)) . '</pre>';// Running the regular expressionif (preg_match( $regexp, $urladdr )){return true; // The domain passed}else{return false; // The domain didn't pass the expression}} // END Function validateUrlSyntax()/*** About ValidateEmailSyntax():* This function uses the ValidateUrlSyntax() function to easily check the* syntax of an email address. It accepts the same options as ValidateURLSyntax* but defaults them for email addresses.*** Usage:* <code>* validateEmailSyntax( url_to_check[, options])* </code>* url_to_check - string - The url to check** options - string - A optional string of options to set which parts of* the url are required, optional, or not allowed. Each option* must be followed by a "+" for required, "?" for optional, or* "-" for not allowed. See ValidateUrlSyntax() docs for option list.** The default options are changed to:* s-H-S-E+F-u+P-a+I-p-f-q-r-** This only allows an address of "name@domain".** Examples:* <code>* validateEmailSyntax('george@fakemail.com')* validateEmailSyntax('mailto:george@fakemail.com', 's+')* validateEmailSyntax('george@fakemail.com?subject=Hi%20George', 'q?')* validateEmailSyntax('george@212.198.33.12', 'I?')* </code>*** Author(s):* Rod Apeldoorn - rod(at)canowhoopass(dot)com*** Homepage:* http://www.canowhoopass.com/*** License:* Copyright 2004 - Rod Apeldoorn** Released under same license as validateUrlSyntax(). For details, contact me.*/function validateEmailSyntax( $emailaddr, $options="" ){// Check Options Parameterif (!preg_match( '/^([sHSEFuPaIpfqr][+?-])*$/', $options )){trigger_error("Options attribute malformed", E_USER_ERROR);}// Set Options Array, set defaults if options are not specified// Schemeif (strpos( $options, 's') === false) $aOptions['s'] = '-';else $aOptions['s'] = substr( $options, strpos( $options, 's') + 1, 1);// http://if (strpos( $options, 'H') === false) $aOptions['H'] = '-';else $aOptions['H'] = substr( $options, strpos( $options, 'H') + 1, 1);// https:// (SSL)if (strpos( $options, 'S') === false) $aOptions['S'] = '-';else $aOptions['S'] = substr( $options, strpos( $options, 'S') + 1, 1);// mailto: (email)if (strpos( $options, 'E') === false) $aOptions['E'] = '?';else $aOptions['E'] = substr( $options, strpos( $options, 'E') + 1, 1);// ftp://if (strpos( $options, 'F') === false) $aOptions['F'] = '-';else $aOptions['F'] = substr( $options, strpos( $options, 'F') + 1, 1);// User sectionif (strpos( $options, 'u') === false) $aOptions['u'] = '+';else $aOptions['u'] = substr( $options, strpos( $options, 'u') + 1, 1);// Password in user sectionif (strpos( $options, 'P') === false) $aOptions['P'] = '-';else $aOptions['P'] = substr( $options, strpos( $options, 'P') + 1, 1);// Address Sectionif (strpos( $options, 'a') === false) $aOptions['a'] = '+';else $aOptions['a'] = substr( $options, strpos( $options, 'a') + 1, 1);// IP Address in address sectionif (strpos( $options, 'I') === false) $aOptions['I'] = '-';else $aOptions['I'] = substr( $options, strpos( $options, 'I') + 1, 1);// Port numberif (strpos( $options, 'p') === false) $aOptions['p'] = '-';else $aOptions['p'] = substr( $options, strpos( $options, 'p') + 1, 1);// File Pathif (strpos( $options, 'f') === false) $aOptions['f'] = '-';else $aOptions['f'] = substr( $options, strpos( $options, 'f') + 1, 1);// Query Sectionif (strpos( $options, 'q') === false) $aOptions['q'] = '-';else $aOptions['q'] = substr( $options, strpos( $options, 'q') + 1, 1);// Fragment (Anchor)if (strpos( $options, 'r') === false) $aOptions['r'] = '-';else $aOptions['r'] = substr( $options, strpos( $options, 'r') + 1, 1);// Generate options$newoptions = '';foreach($aOptions as $key => $value){$newoptions .= $key . $value;}// DEBUGGING - Uncomment line below to display generated options// echo '<pre>' . $newoptions . '</pre>';// Send to validateUrlSyntax() and return resultreturn validateUrlSyntax( $emailaddr, $newoptions);} // END Function validateEmailSyntax()/*** About ValidateFtpSyntax():* This function uses the ValidateUrlSyntax() function to easily check the* syntax of an FTP address. It accepts the same options as ValidateURLSyntax* but defaults them for FTP addresses.*** Usage:* <code>* validateFtpSyntax( url_to_check[, options])* </code>* url_to_check - string - The url to check** options - string - A optional string of options to set which parts of* the url are required, optional, or not allowed. Each option* must be followed by a "+" for required, "?" for optional, or* "-" for not allowed. See ValidateUrlSyntax() docs for option list.** The default options are changed to:* s?H-S-E-F+u?P?a+I?p?f?q-r-** Examples:* <code>* validateFtpSyntax('ftp://netscape.com')* validateFtpSyntax('moz:iesucks@netscape.com')* validateFtpSyntax('ftp://netscape.com:2121/browsers/ns7/', 'u-')* </code>** Author(s):* Rod Apeldoorn - rod(at)canowhoopass(dot)com*** Homepage:* http://www.canowhoopass.com/*** License:* Copyright 2004 - Rod Apeldoorn** Released under same license as validateUrlSyntax(). For details, contact me.*/function validateFtpSyntax( $ftpaddr, $options="" ){// Check Options Parameterif (!preg_match( '/^([sHSEFuPaIpfqr][+?-])*$/', $options )){trigger_error("Options attribute malformed", E_USER_ERROR);}// Set Options Array, set defaults if options are not specified// Schemeif (strpos( $options, 's') === false) $aOptions['s'] = '?';else $aOptions['s'] = substr( $options, strpos( $options, 's') + 1, 1);// http://if (strpos( $options, 'H') === false) $aOptions['H'] = '-';else $aOptions['H'] = substr( $options, strpos( $options, 'H') + 1, 1);// https:// (SSL)if (strpos( $options, 'S') === false) $aOptions['S'] = '-';else $aOptions['S'] = substr( $options, strpos( $options, 'S') + 1, 1);// mailto: (email)if (strpos( $options, 'E') === false) $aOptions['E'] = '-';else $aOptions['E'] = substr( $options, strpos( $options, 'E') + 1, 1);// ftp://if (strpos( $options, 'F') === false) $aOptions['F'] = '+';else $aOptions['F'] = substr( $options, strpos( $options, 'F') + 1, 1);// User sectionif (strpos( $options, 'u') === false) $aOptions['u'] = '?';else $aOptions['u'] = substr( $options, strpos( $options, 'u') + 1, 1);// Password in user sectionif (strpos( $options, 'P') === false) $aOptions['P'] = '?';else $aOptions['P'] = substr( $options, strpos( $options, 'P') + 1, 1);// Address Sectionif (strpos( $options, 'a') === false) $aOptions['a'] = '+';else $aOptions['a'] = substr( $options, strpos( $options, 'a') + 1, 1);// IP Address in address sectionif (strpos( $options, 'I') === false) $aOptions['I'] = '?';else $aOptions['I'] = substr( $options, strpos( $options, 'I') + 1, 1);// Port numberif (strpos( $options, 'p') === false) $aOptions['p'] = '?';else $aOptions['p'] = substr( $options, strpos( $options, 'p') + 1, 1);// File Pathif (strpos( $options, 'f') === false) $aOptions['f'] = '?';else $aOptions['f'] = substr( $options, strpos( $options, 'f') + 1, 1);// Query Sectionif (strpos( $options, 'q') === false) $aOptions['q'] = '-';else $aOptions['q'] = substr( $options, strpos( $options, 'q') + 1, 1);// Fragment (Anchor)if (strpos( $options, 'r') === false) $aOptions['r'] = '-';else $aOptions['r'] = substr( $options, strpos( $options, 'r') + 1, 1);// Generate options$newoptions = '';foreach($aOptions as $key => $value){$newoptions .= $key . $value;}// DEBUGGING - Uncomment line below to display generated options// echo '<pre>' . $newoptions . '</pre>';// Send to validateUrlSyntax() and return resultreturn validateUrlSyntax( $ftpaddr, $newoptions);} // END Function validateFtpSyntax()