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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 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()