Proyectos de Subversion Moodle

<?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 Parameter

    if (!preg_match( '/^([sHSEFRuPaIpfqr][+?-])*$/', $options ))

    {

        trigger_error("Options attribute malformed", E_USER_ERROR);

    }

    // Set Options Array, set defaults if options are not specified

    // Scheme

    if (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 section

    if (strpos( $options, 'u') === false) $aOptions['u'] = '?';

    else $aOptions['u'] = substr( $options, strpos( $options, 'u') + 1, 1);

    // Password in user section

    if (strpos( $options, 'P') === false) $aOptions['P'] = '?';

    else $aOptions['P'] = substr( $options, strpos( $options, 'P') + 1, 1);

    // Address Section

    if (strpos( $options, 'a') === false) $aOptions['a'] = '+';

    else $aOptions['a'] = substr( $options, strpos( $options, 'a') + 1, 1);

    // IP Address in address section

    if (strpos( $options, 'I') === false) $aOptions['I'] = '?';

    else $aOptions['I'] = substr( $options, strpos( $options, 'I') + 1, 1);

    // Port number

    if (strpos( $options, 'p') === false) $aOptions['p'] = '?';

    else $aOptions['p'] = substr( $options, strpos( $options, 'p') + 1, 1);

    // File Path

    if (strpos( $options, 'f') === false) $aOptions['f'] = '?';

    else $aOptions['f'] = substr( $options, strpos( $options, 'f') + 1, 1);

    // Query Section

    if (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 Domain

    if ($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 expression

    if (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 Parameter

    if (!preg_match( '/^([sHSEFuPaIpfqr][+?-])*$/', $options ))

    {

        trigger_error("Options attribute malformed", E_USER_ERROR);

    }

    // Set Options Array, set defaults if options are not specified

    // Scheme

    if (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 section

    if (strpos( $options, 'u') === false) $aOptions['u'] = '+';

    else $aOptions['u'] = substr( $options, strpos( $options, 'u') + 1, 1);

    // Password in user section

    if (strpos( $options, 'P') === false) $aOptions['P'] = '-';

    else $aOptions['P'] = substr( $options, strpos( $options, 'P') + 1, 1);

    // Address Section

    if (strpos( $options, 'a') === false) $aOptions['a'] = '+';

    else $aOptions['a'] = substr( $options, strpos( $options, 'a') + 1, 1);

    // IP Address in address section

    if (strpos( $options, 'I') === false) $aOptions['I'] = '-';

    else $aOptions['I'] = substr( $options, strpos( $options, 'I') + 1, 1);

    // Port number

    if (strpos( $options, 'p') === false) $aOptions['p'] = '-';

    else $aOptions['p'] = substr( $options, strpos( $options, 'p') + 1, 1);

    // File Path

    if (strpos( $options, 'f') === false) $aOptions['f'] = '-';

    else $aOptions['f'] = substr( $options, strpos( $options, 'f') + 1, 1);

    // Query Section

    if (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 result

    return 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 Parameter

    if (!preg_match( '/^([sHSEFuPaIpfqr][+?-])*$/', $options ))

    {

        trigger_error("Options attribute malformed", E_USER_ERROR);

    }

    // Set Options Array, set defaults if options are not specified

    // Scheme

    if (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 section

    if (strpos( $options, 'u') === false) $aOptions['u'] = '?';

    else $aOptions['u'] = substr( $options, strpos( $options, 'u') + 1, 1);

    // Password in user section

    if (strpos( $options, 'P') === false) $aOptions['P'] = '?';

    else $aOptions['P'] = substr( $options, strpos( $options, 'P') + 1, 1);

    // Address Section

    if (strpos( $options, 'a') === false) $aOptions['a'] = '+';

    else $aOptions['a'] = substr( $options, strpos( $options, 'a') + 1, 1);

    // IP Address in address section

    if (strpos( $options, 'I') === false) $aOptions['I'] = '?';

    else $aOptions['I'] = substr( $options, strpos( $options, 'I') + 1, 1);

    // Port number

    if (strpos( $options, 'p') === false) $aOptions['p'] = '?';

    else $aOptions['p'] = substr( $options, strpos( $options, 'p') + 1, 1);

    // File Path

    if (strpos( $options, 'f') === false) $aOptions['f'] = '?';

    else $aOptions['f'] = substr( $options, strpos( $options, 'f') + 1, 1);

    // Query Section

    if (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 result

    return validateUrlSyntax( $ftpaddr, $newoptions);

} // END Function validateFtpSyntax()