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Edit File : Date.php \| Size : 19.24 KB
<?php /** * SimplePie * * A PHP-Based RSS and Atom Feed Framework. * Takes the hard work out of managing a complete RSS/Atom solution. * * Copyright (c) 2004-2012, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, are * permitted provided that the following conditions are met: * * * Redistributions of source code must retain the above copyright notice, this list of * conditions and the following disclaimer. * * * Redistributions in binary form must reproduce the above copyright notice, this list * of conditions and the following disclaimer in the documentation and/or other materials * provided with the distribution. * * * Neither the name of the SimplePie Team nor the names of its contributors may be used * to endorse or promote products derived from this software without specific prior * written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS * AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * * @package SimplePie * @version 1.3.1 * @copyright 2004-2012 Ryan Parman, Geoffrey Sneddon, Ryan McCue * @author Ryan Parman * @author Geoffrey Sneddon * @author Ryan McCue * @link http://simplepie.org/ SimplePie * @license http://www.opensource.org/licenses/bsd-license.php BSD License / /* * Date Parser * * @package SimplePie * @subpackage Parsing / class SimplePie_Parse_Date { /* * Input data * * @access protected * @var string / var $date; /* * List of days, calendar day name => ordinal day number in the week * * @access protected * @var array / var $day = array( // English 'mon' => 1, 'monday' => 1, 'tue' => 2, 'tuesday' => 2, 'wed' => 3, 'wednesday' => 3, 'thu' => 4, 'thursday' => 4, 'fri' => 5, 'friday' => 5, 'sat' => 6, 'saturday' => 6, 'sun' => 7, 'sunday' => 7, // Dutch 'maandag' => 1, 'dinsdag' => 2, 'woensdag' => 3, 'donderdag' => 4, 'vrijdag' => 5, 'zaterdag' => 6, 'zondag' => 7, // French 'lundi' => 1, 'mardi' => 2, 'mercredi' => 3, 'jeudi' => 4, 'vendredi' => 5, 'samedi' => 6, 'dimanche' => 7, // German 'montag' => 1, 'dienstag' => 2, 'mittwoch' => 3, 'donnerstag' => 4, 'freitag' => 5, 'samstag' => 6, 'sonnabend' => 6, 'sonntag' => 7, // Italian 'lunedì' => 1, 'martedì' => 2, 'mercoledì' => 3, 'giovedì' => 4, 'venerdì' => 5, 'sabato' => 6, 'domenica' => 7, // Spanish 'lunes' => 1, 'martes' => 2, 'miércoles' => 3, 'jueves' => 4, 'viernes' => 5, 'sábado' => 6, 'domingo' => 7, // Finnish 'maanantai' => 1, 'tiistai' => 2, 'keskiviikko' => 3, 'torstai' => 4, 'perjantai' => 5, 'lauantai' => 6, 'sunnuntai' => 7, // Hungarian 'hétfő' => 1, 'kedd' => 2, 'szerda' => 3, 'csütörtok' => 4, 'péntek' => 5, 'szombat' => 6, 'vasárnap' => 7, // Greek 'Δευ' => 1, 'Τρι' => 2, 'Τετ' => 3, 'Πεμ' => 4, 'Παρ' => 5, 'Σαβ' => 6, 'Κυρ' => 7, ); /* * List of months, calendar month name => calendar month number * * @access protected * @var array / var $month = array( // English 'jan' => 1, 'january' => 1, 'feb' => 2, 'february' => 2, 'mar' => 3, 'march' => 3, 'apr' => 4, 'april' => 4, 'may' => 5, // No long form of May 'jun' => 6, 'june' => 6, 'jul' => 7, 'july' => 7, 'aug' => 8, 'august' => 8, 'sep' => 9, 'september' => 8, 'oct' => 10, 'october' => 10, 'nov' => 11, 'november' => 11, 'dec' => 12, 'december' => 12, // Dutch 'januari' => 1, 'februari' => 2, 'maart' => 3, 'april' => 4, 'mei' => 5, 'juni' => 6, 'juli' => 7, 'augustus' => 8, 'september' => 9, 'oktober' => 10, 'november' => 11, 'december' => 12, // French 'janvier' => 1, 'février' => 2, 'mars' => 3, 'avril' => 4, 'mai' => 5, 'juin' => 6, 'juillet' => 7, 'août' => 8, 'septembre' => 9, 'octobre' => 10, 'novembre' => 11, 'décembre' => 12, // German 'januar' => 1, 'februar' => 2, 'märz' => 3, 'april' => 4, 'mai' => 5, 'juni' => 6, 'juli' => 7, 'august' => 8, 'september' => 9, 'oktober' => 10, 'november' => 11, 'dezember' => 12, // Italian 'gennaio' => 1, 'febbraio' => 2, 'marzo' => 3, 'aprile' => 4, 'maggio' => 5, 'giugno' => 6, 'luglio' => 7, 'agosto' => 8, 'settembre' => 9, 'ottobre' => 10, 'novembre' => 11, 'dicembre' => 12, // Spanish 'enero' => 1, 'febrero' => 2, 'marzo' => 3, 'abril' => 4, 'mayo' => 5, 'junio' => 6, 'julio' => 7, 'agosto' => 8, 'septiembre' => 9, 'setiembre' => 9, 'octubre' => 10, 'noviembre' => 11, 'diciembre' => 12, // Finnish 'tammikuu' => 1, 'helmikuu' => 2, 'maaliskuu' => 3, 'huhtikuu' => 4, 'toukokuu' => 5, 'kesäkuu' => 6, 'heinäkuu' => 7, 'elokuu' => 8, 'suuskuu' => 9, 'lokakuu' => 10, 'marras' => 11, 'joulukuu' => 12, // Hungarian 'január' => 1, 'február' => 2, 'március' => 3, 'április' => 4, 'május' => 5, 'június' => 6, 'július' => 7, 'augusztus' => 8, 'szeptember' => 9, 'október' => 10, 'november' => 11, 'december' => 12, // Greek 'Ιαν' => 1, 'Φεβ' => 2, 'Μάώ' => 3, 'Μαώ' => 3, 'Απρ' => 4, 'Μάι' => 5, 'Μαϊ' => 5, 'Μαι' => 5, 'Ιούν' => 6, 'Ιον' => 6, 'Ιούλ' => 7, 'Ιολ' => 7, 'Αύγ' => 8, 'Αυγ' => 8, 'Σεπ' => 9, 'Οκτ' => 10, 'Νοέ' => 11, 'Δεκ' => 12, ); /* * List of timezones, abbreviation => offset from UTC * * @access protected * @var array / var $timezone = array( 'ACDT' => 37800, 'ACIT' => 28800, 'ACST' => 34200, 'ACT' => -18000, 'ACWDT' => 35100, 'ACWST' => 31500, 'AEDT' => 39600, 'AEST' => 36000, 'AFT' => 16200, 'AKDT' => -28800, 'AKST' => -32400, 'AMDT' => 18000, 'AMT' => -14400, 'ANAST' => 46800, 'ANAT' => 43200, 'ART' => -10800, 'AZOST' => -3600, 'AZST' => 18000, 'AZT' => 14400, 'BIOT' => 21600, 'BIT' => -43200, 'BOT' => -14400, 'BRST' => -7200, 'BRT' => -10800, 'BST' => 3600, 'BTT' => 21600, 'CAST' => 18000, 'CAT' => 7200, 'CCT' => 23400, 'CDT' => -18000, 'CEDT' => 7200, 'CEST' => 7200, 'CET' => 3600, 'CGST' => -7200, 'CGT' => -10800, 'CHADT' => 49500, 'CHAST' => 45900, 'CIST' => -28800, 'CKT' => -36000, 'CLDT' => -10800, 'CLST' => -14400, 'COT' => -18000, 'CST' => -21600, 'CVT' => -3600, 'CXT' => 25200, 'DAVT' => 25200, 'DTAT' => 36000, 'EADT' => -18000, 'EAST' => -21600, 'EAT' => 10800, 'ECT' => -18000, 'EDT' => -14400, 'EEST' => 10800, 'EET' => 7200, 'EGT' => -3600, 'EKST' => 21600, 'EST' => -18000, 'FJT' => 43200, 'FKDT' => -10800, 'FKST' => -14400, 'FNT' => -7200, 'GALT' => -21600, 'GEDT' => 14400, 'GEST' => 10800, 'GFT' => -10800, 'GILT' => 43200, 'GIT' => -32400, 'GST' => 14400, 'GST' => -7200, 'GYT' => -14400, 'HAA' => -10800, 'HAC' => -18000, 'HADT' => -32400, 'HAE' => -14400, 'HAP' => -25200, 'HAR' => -21600, 'HAST' => -36000, 'HAT' => -9000, 'HAY' => -28800, 'HKST' => 28800, 'HMT' => 18000, 'HNA' => -14400, 'HNC' => -21600, 'HNE' => -18000, 'HNP' => -28800, 'HNR' => -25200, 'HNT' => -12600, 'HNY' => -32400, 'IRDT' => 16200, 'IRKST' => 32400, 'IRKT' => 28800, 'IRST' => 12600, 'JFDT' => -10800, 'JFST' => -14400, 'JST' => 32400, 'KGST' => 21600, 'KGT' => 18000, 'KOST' => 39600, 'KOVST' => 28800, 'KOVT' => 25200, 'KRAST' => 28800, 'KRAT' => 25200, 'KST' => 32400, 'LHDT' => 39600, 'LHST' => 37800, 'LINT' => 50400, 'LKT' => 21600, 'MAGST' => 43200, 'MAGT' => 39600, 'MAWT' => 21600, 'MDT' => -21600, 'MESZ' => 7200, 'MEZ' => 3600, 'MHT' => 43200, 'MIT' => -34200, 'MNST' => 32400, 'MSDT' => 14400, 'MSST' => 10800, 'MST' => -25200, 'MUT' => 14400, 'MVT' => 18000, 'MYT' => 28800, 'NCT' => 39600, 'NDT' => -9000, 'NFT' => 41400, 'NMIT' => 36000, 'NOVST' => 25200, 'NOVT' => 21600, 'NPT' => 20700, 'NRT' => 43200, 'NST' => -12600, 'NUT' => -39600, 'NZDT' => 46800, 'NZST' => 43200, 'OMSST' => 25200, 'OMST' => 21600, 'PDT' => -25200, 'PET' => -18000, 'PETST' => 46800, 'PETT' => 43200, 'PGT' => 36000, 'PHOT' => 46800, 'PHT' => 28800, 'PKT' => 18000, 'PMDT' => -7200, 'PMST' => -10800, 'PONT' => 39600, 'PST' => -28800, 'PWT' => 32400, 'PYST' => -10800, 'PYT' => -14400, 'RET' => 14400, 'ROTT' => -10800, 'SAMST' => 18000, 'SAMT' => 14400, 'SAST' => 7200, 'SBT' => 39600, 'SCDT' => 46800, 'SCST' => 43200, 'SCT' => 14400, 'SEST' => 3600, 'SGT' => 28800, 'SIT' => 28800, 'SRT' => -10800, 'SST' => -39600, 'SYST' => 10800, 'SYT' => 7200, 'TFT' => 18000, 'THAT' => -36000, 'TJT' => 18000, 'TKT' => -36000, 'TMT' => 18000, 'TOT' => 46800, 'TPT' => 32400, 'TRUT' => 36000, 'TVT' => 43200, 'TWT' => 28800, 'UYST' => -7200, 'UYT' => -10800, 'UZT' => 18000, 'VET' => -14400, 'VLAST' => 39600, 'VLAT' => 36000, 'VOST' => 21600, 'VUT' => 39600, 'WAST' => 7200, 'WAT' => 3600, 'WDT' => 32400, 'WEST' => 3600, 'WFT' => 43200, 'WIB' => 25200, 'WIT' => 32400, 'WITA' => 28800, 'WKST' => 18000, 'WST' => 28800, 'YAKST' => 36000, 'YAKT' => 32400, 'YAPT' => 36000, 'YEKST' => 21600, 'YEKT' => 18000, ); /* * Cached PCRE for SimplePie_Parse_Date::$day * * @access protected * @var string / var $day_pcre; /* * Cached PCRE for SimplePie_Parse_Date::$month * * @access protected * @var string / var $month_pcre; /* * Array of user-added callback methods * * @access private * @var array / var $built_in = array(); /* * Array of user-added callback methods * * @access private * @var array / var $user = array(); /* * Create new SimplePie_Parse_Date object, and set self::day_pcre, * self::month_pcre, and self::built_in * * @access private / public function __construct() { $this->day_pcre = '(' . implode(array_keys($this->day), '\|') . ')'; $this->month_pcre = '(' . implode(array_keys($this->month), '\|') . ')'; static $cache; if (!isset($cache[get_class($this)])) { $all_methods = get_class_methods($this); foreach ($all_methods as $method) { if (strtolower(substr($method, 0, 5)) === 'date_') { $cache[get_class($this)][] = $method; } } } foreach ($cache[get_class($this)] as $method) { $this->built_in[] = $method; } } /* * Get the object * * @access public / public static function get() { static $object; if (!$object) { $object = new SimplePie_Parse_Date; } return $object; } /* * Parse a date * * @final * @access public * @param string $date Date to parse * @return int Timestamp corresponding to date string, or false on failure / public function parse($date) { foreach ($this->user as $method) { if (($returned = call_user_func($method, $date)) !== false) { return $returned; } } foreach ($this->built_in as $method) { if (($returned = call_user_func(array($this, $method), $date)) !== false) { return $returned; } } return false; } /* * Add a callback method to parse a date * * @final * @access public * @param callable $callback / public function add_callback($callback) { if (is_callable($callback)) { $this->user[] = $callback; } else { trigger_error('User-supplied function must be a valid callback', E_USER_WARNING); } } /* * Parse a superset of W3C-DTF (allows hyphens and colons to be omitted, as * well as allowing any of upper or lower case "T", horizontal tabs, or * spaces to be used as the time seperator (including more than one)) * * @access protected * @return int Timestamp / public function date_w3cdtf($date) { static $pcre; if (!$pcre) { $year = '([0-9]{4})'; $month = $day = $hour = $minute = $second = '([0-9]{2})'; $decimal = '([0-9])'; $zone = '(?:(Z)\|([+\-])([0-9]{1,2}):?([0-9]{1,2}))'; $pcre = '/^' . $year . '(?:-?' . $month . '(?:-?' . $day . '(?:[Tt\x09\x20]+' . $hour . '(?::?' . $minute . '(?::?' . $second . '(?:.' . $decimal . ')?)?)?' . $zone . ')?)?)?$/'; } if (preg_match($pcre, $date, $match)) { /* Capturing subpatterns: 1: Year 2: Month 3: Day 4: Hour 5: Minute 6: Second 7: Decimal fraction of a second 8: Zulu 9: Timezone ± 10: Timezone hours 11: Timezone minutes / // Fill in empty matches for ($i = count($match); $i <= 3; $i++) { $match[$i] = '1'; } for ($i = count($match); $i <= 7; $i++) { $match[$i] = '0'; } // Numeric timezone if (isset($match[9]) && $match[9] !== '') { $timezone = $match[10] 3600; $timezone += $match[11] * 60; if ($match[9] === '-') { $timezone = 0 - $timezone; } } else { $timezone = 0; } // Convert the number of seconds to an integer, taking decimals into account $second = round($match[6] + $match[7] / pow(10, strlen($match[7]))); return gmmktime($match[4], $match[5], $second, $match[2], $match[3], $match[1]) - $timezone; } else { return false; } } /** * Remove RFC822 comments * * @access protected * @param string $data Data to strip comments from * @return string Comment stripped string / public function remove_rfc2822_comments($string) { $string = (string) $string; $position = 0; $length = strlen($string); $depth = 0; $output = ''; while ($position < $length && ($pos = strpos($string, '(', $position)) !== false) { $output .= substr($string, $position, $pos - $position); $position = $pos + 1; if ($string[$pos - 1] !== '\\') { $depth++; while ($depth && $position < $length) { $position += strcspn($string, '()', $position); if ($string[$position - 1] === '\\') { $position++; continue; } elseif (isset($string[$position])) { switch ($string[$position]) { case '(': $depth++; break; case ')': $depth--; break; } $position++; } else { break; } } } else { $output .= '('; } } $output .= substr($string, $position); return $output; } /* * Parse RFC2822's date format * * @access protected * @return int Timestamp / public function date_rfc2822($date) { static $pcre; if (!$pcre) { $wsp = '[\x09\x20]'; $fws = '(?:' . $wsp . '+\|' . $wsp . '(?:\x0D\x0A' . $wsp . '+)+)'; $optional_fws = $fws . '?'; $day_name = $this->day_pcre; $month = $this->month_pcre; $day = '([0-9]{1,2})'; $hour = $minute = $second = '([0-9]{2})'; $year = '([0-9]{2,4})'; $num_zone = '([+\-])([0-9]{2})([0-9]{2})'; $character_zone = '([A-Z]{1,5})'; $zone = '(?:' . $num_zone . '\|' . $character_zone . ')'; $pcre = '/(?:' . $optional_fws . $day_name . $optional_fws . ',)?' . $optional_fws . $day . $fws . $month . $fws . $year . $fws . $hour . $optional_fws . ':' . $optional_fws . $minute . '(?:' . $optional_fws . ':' . $optional_fws . $second . ')?' . $fws . $zone . '/i'; } if (preg_match($pcre, $this->remove_rfc2822_comments($date), $match)) { /* Capturing subpatterns: 1: Day name 2: Day 3: Month 4: Year 5: Hour 6: Minute 7: Second 8: Timezone ± 9: Timezone hours 10: Timezone minutes 11: Alphabetic timezone / // Find the month number $month = $this->month[strtolower($match[3])]; // Numeric timezone if ($match[8] !== '') { $timezone = $match[9] 3600; $timezone += $match[10] * 60; if ($match[8] === '-') { $timezone = 0 - $timezone; } } // Character timezone elseif (isset($this->timezone[strtoupper($match[11])])) { $timezone = $this->timezone[strtoupper($match[11])]; } // Assume everything else to be -0000 else { $timezone = 0; } // Deal with 2/3 digit years if ($match[4] < 50) { $match[4] += 2000; } elseif ($match[4] < 1000) { $match[4] += 1900; } // Second is optional, if it is empty set it to zero if ($match[7] !== '') { $second = $match[7]; } else { $second = 0; } return gmmktime($match[5], $match[6], $second, $month, $match[2], $match[4]) - $timezone; } else { return false; } } /** * Parse RFC850's date format * * @access protected * @return int Timestamp / public function date_rfc850($date) { static $pcre; if (!$pcre) { $space = '[\x09\x20]+'; $day_name = $this->day_pcre; $month = $this->month_pcre; $day = '([0-9]{1,2})'; $year = $hour = $minute = $second = '([0-9]{2})'; $zone = '([A-Z]{1,5})'; $pcre = '/^' . $day_name . ',' . $space . $day . '-' . $month . '-' . $year . $space . $hour . ':' . $minute . ':' . $second . $space . $zone . '$/i'; } if (preg_match($pcre, $date, $match)) { / Capturing subpatterns: 1: Day name 2: Day 3: Month 4: Year 5: Hour 6: Minute 7: Second 8: Timezone / // Month $month = $this->month[strtolower($match[3])]; // Character timezone if (isset($this->timezone[strtoupper($match[8])])) { $timezone = $this->timezone[strtoupper($match[8])]; } // Assume everything else to be -0000 else { $timezone = 0; } // Deal with 2 digit year if ($match[4] < 50) { $match[4] += 2000; } else { $match[4] += 1900; } return gmmktime($match[5], $match[6], $match[7], $month, $match[2], $match[4]) - $timezone; } else { return false; } } /* * Parse C99's asctime()'s date format * * @access protected * @return int Timestamp / public function date_asctime($date) { static $pcre; if (!$pcre) { $space = '[\x09\x20]+'; $wday_name = $this->day_pcre; $mon_name = $this->month_pcre; $day = '([0-9]{1,2})'; $hour = $sec = $min = '([0-9]{2})'; $year = '([0-9]{4})'; $terminator = '\x0A?\x00?'; $pcre = '/^' . $wday_name . $space . $mon_name . $space . $day . $space . $hour . ':' . $min . ':' . $sec . $space . $year . $terminator . '$/i'; } if (preg_match($pcre, $date, $match)) { / Capturing subpatterns: 1: Day name 2: Month 3: Day 4: Hour 5: Minute 6: Second 7: Year / $month = $this->month[strtolower($match[2])]; return gmmktime($match[4], $match[5], $match[6], $month, $match[3], $match[7]); } else { return false; } } /* * Parse dates using strtotime() * * @access protected * @return int Timestamp */ public function date_strtotime($date) { $strtotime = strtotime($date); if ($strtotime === -1 \|\| $strtotime === false) { return false; } else { return $strtotime; } } } Back

Edit File : Date.php | Size : 19.24 KB

<?php
/**
 * SimplePie
 *
 * A PHP-Based RSS and Atom Feed Framework.
 * Takes the hard work out of managing a complete RSS/Atom solution.
 *
 * Copyright (c) 2004-2012, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 *
 * 	* Redistributions of source code must retain the above copyright notice, this list of
 * 	  conditions and the following disclaimer.
 *
 * 	* Redistributions in binary form must reproduce the above copyright notice, this list
 * 	  of conditions and the following disclaimer in the documentation and/or other materials
 * 	  provided with the distribution.
 *
 * 	* Neither the name of the SimplePie Team nor the names of its contributors may be used
 * 	  to endorse or promote products derived from this software without specific prior
 * 	  written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS
 * AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * @package SimplePie
 * @version 1.3.1
 * @copyright 2004-2012 Ryan Parman, Geoffrey Sneddon, Ryan McCue
 * @author Ryan Parman
 * @author Geoffrey Sneddon
 * @author Ryan McCue
 * @link http://simplepie.org/ SimplePie
 * @license http://www.opensource.org/licenses/bsd-license.php BSD License
 */

/**
 * Date Parser
 *
 * @package SimplePie
 * @subpackage Parsing
 */
class SimplePie_Parse_Date
{
	/**
	 * Input data
	 *
	 * @access protected
	 * @var string
	 */
	var $date;

/**
	 * List of days, calendar day name => ordinal day number in the week
	 *
	 * @access protected
	 * @var array
	 */
	var $day = array(
		// English
		'mon' => 1,
		'monday' => 1,
		'tue' => 2,
		'tuesday' => 2,
		'wed' => 3,
		'wednesday' => 3,
		'thu' => 4,
		'thursday' => 4,
		'fri' => 5,
		'friday' => 5,
		'sat' => 6,
		'saturday' => 6,
		'sun' => 7,
		'sunday' => 7,
		// Dutch
		'maandag' => 1,
		'dinsdag' => 2,
		'woensdag' => 3,
		'donderdag' => 4,
		'vrijdag' => 5,
		'zaterdag' => 6,
		'zondag' => 7,
		// French
		'lundi' => 1,
		'mardi' => 2,
		'mercredi' => 3,
		'jeudi' => 4,
		'vendredi' => 5,
		'samedi' => 6,
		'dimanche' => 7,
		// German
		'montag' => 1,
		'dienstag' => 2,
		'mittwoch' => 3,
		'donnerstag' => 4,
		'freitag' => 5,
		'samstag' => 6,
		'sonnabend' => 6,
		'sonntag' => 7,
		// Italian
		'lunedì' => 1,
		'martedì' => 2,
		'mercoledì' => 3,
		'giovedì' => 4,
		'venerdì' => 5,
		'sabato' => 6,
		'domenica' => 7,
		// Spanish
		'lunes' => 1,
		'martes' => 2,
		'miércoles' => 3,
		'jueves' => 4,
		'viernes' => 5,
		'sábado' => 6,
		'domingo' => 7,
		// Finnish
		'maanantai' => 1,
		'tiistai' => 2,
		'keskiviikko' => 3,
		'torstai' => 4,
		'perjantai' => 5,
		'lauantai' => 6,
		'sunnuntai' => 7,
		// Hungarian
		'hétfő' => 1,
		'kedd' => 2,
		'szerda' => 3,
		'csütörtok' => 4,
		'péntek' => 5,
		'szombat' => 6,
		'vasárnap' => 7,
		// Greek
		'Δευ' => 1,
		'Τρι' => 2,
		'Τετ' => 3,
		'Πεμ' => 4,
		'Παρ' => 5,
		'Σαβ' => 6,
		'Κυρ' => 7,
	);

/**
	 * List of months, calendar month name => calendar month number
	 *
	 * @access protected
	 * @var array
	 */
	var $month = array(
		// English
		'jan' => 1,
		'january' => 1,
		'feb' => 2,
		'february' => 2,
		'mar' => 3,
		'march' => 3,
		'apr' => 4,
		'april' => 4,
		'may' => 5,
		// No long form of May
		'jun' => 6,
		'june' => 6,
		'jul' => 7,
		'july' => 7,
		'aug' => 8,
		'august' => 8,
		'sep' => 9,
		'september' => 8,
		'oct' => 10,
		'october' => 10,
		'nov' => 11,
		'november' => 11,
		'dec' => 12,
		'december' => 12,
		// Dutch
		'januari' => 1,
		'februari' => 2,
		'maart' => 3,
		'april' => 4,
		'mei' => 5,
		'juni' => 6,
		'juli' => 7,
		'augustus' => 8,
		'september' => 9,
		'oktober' => 10,
		'november' => 11,
		'december' => 12,
		// French
		'janvier' => 1,
		'février' => 2,
		'mars' => 3,
		'avril' => 4,
		'mai' => 5,
		'juin' => 6,
		'juillet' => 7,
		'août' => 8,
		'septembre' => 9,
		'octobre' => 10,
		'novembre' => 11,
		'décembre' => 12,
		// German
		'januar' => 1,
		'februar' => 2,
		'märz' => 3,
		'april' => 4,
		'mai' => 5,
		'juni' => 6,
		'juli' => 7,
		'august' => 8,
		'september' => 9,
		'oktober' => 10,
		'november' => 11,
		'dezember' => 12,
		// Italian
		'gennaio' => 1,
		'febbraio' => 2,
		'marzo' => 3,
		'aprile' => 4,
		'maggio' => 5,
		'giugno' => 6,
		'luglio' => 7,
		'agosto' => 8,
		'settembre' => 9,
		'ottobre' => 10,
		'novembre' => 11,
		'dicembre' => 12,
		// Spanish
		'enero' => 1,
		'febrero' => 2,
		'marzo' => 3,
		'abril' => 4,
		'mayo' => 5,
		'junio' => 6,
		'julio' => 7,
		'agosto' => 8,
		'septiembre' => 9,
		'setiembre' => 9,
		'octubre' => 10,
		'noviembre' => 11,
		'diciembre' => 12,
		// Finnish
		'tammikuu' => 1,
		'helmikuu' => 2,
		'maaliskuu' => 3,
		'huhtikuu' => 4,
		'toukokuu' => 5,
		'kesäkuu' => 6,
		'heinäkuu' => 7,
		'elokuu' => 8,
		'suuskuu' => 9,
		'lokakuu' => 10,
		'marras' => 11,
		'joulukuu' => 12,
		// Hungarian
		'január' => 1,
		'február' => 2,
		'március' => 3,
		'április' => 4,
		'május' => 5,
		'június' => 6,
		'július' => 7,
		'augusztus' => 8,
		'szeptember' => 9,
		'október' => 10,
		'november' => 11,
		'december' => 12,
		// Greek
		'Ιαν' => 1,
		'Φεβ' => 2,
		'Μάώ' => 3,
		'Μαώ' => 3,
		'Απρ' => 4,
		'Μάι' => 5,
		'Μαϊ' => 5,
		'Μαι' => 5,
		'Ιούν' => 6,
		'Ιον' => 6,
		'Ιούλ' => 7,
		'Ιολ' => 7,
		'Αύγ' => 8,
		'Αυγ' => 8,
		'Σεπ' => 9,
		'Οκτ' => 10,
		'Νοέ' => 11,
		'Δεκ' => 12,
	);

/**
	 * List of timezones, abbreviation => offset from UTC
	 *
	 * @access protected
	 * @var array
	 */
	var $timezone = array(
		'ACDT' => 37800,
		'ACIT' => 28800,
		'ACST' => 34200,
		'ACT' => -18000,
		'ACWDT' => 35100,
		'ACWST' => 31500,
		'AEDT' => 39600,
		'AEST' => 36000,
		'AFT' => 16200,
		'AKDT' => -28800,
		'AKST' => -32400,
		'AMDT' => 18000,
		'AMT' => -14400,
		'ANAST' => 46800,
		'ANAT' => 43200,
		'ART' => -10800,
		'AZOST' => -3600,
		'AZST' => 18000,
		'AZT' => 14400,
		'BIOT' => 21600,
		'BIT' => -43200,
		'BOT' => -14400,
		'BRST' => -7200,
		'BRT' => -10800,
		'BST' => 3600,
		'BTT' => 21600,
		'CAST' => 18000,
		'CAT' => 7200,
		'CCT' => 23400,
		'CDT' => -18000,
		'CEDT' => 7200,
		'CEST' => 7200,
		'CET' => 3600,
		'CGST' => -7200,
		'CGT' => -10800,
		'CHADT' => 49500,
		'CHAST' => 45900,
		'CIST' => -28800,
		'CKT' => -36000,
		'CLDT' => -10800,
		'CLST' => -14400,
		'COT' => -18000,
		'CST' => -21600,
		'CVT' => -3600,
		'CXT' => 25200,
		'DAVT' => 25200,
		'DTAT' => 36000,
		'EADT' => -18000,
		'EAST' => -21600,
		'EAT' => 10800,
		'ECT' => -18000,
		'EDT' => -14400,
		'EEST' => 10800,
		'EET' => 7200,
		'EGT' => -3600,
		'EKST' => 21600,
		'EST' => -18000,
		'FJT' => 43200,
		'FKDT' => -10800,
		'FKST' => -14400,
		'FNT' => -7200,
		'GALT' => -21600,
		'GEDT' => 14400,
		'GEST' => 10800,
		'GFT' => -10800,
		'GILT' => 43200,
		'GIT' => -32400,
		'GST' => 14400,
		'GST' => -7200,
		'GYT' => -14400,
		'HAA' => -10800,
		'HAC' => -18000,
		'HADT' => -32400,
		'HAE' => -14400,
		'HAP' => -25200,
		'HAR' => -21600,
		'HAST' => -36000,
		'HAT' => -9000,
		'HAY' => -28800,
		'HKST' => 28800,
		'HMT' => 18000,
		'HNA' => -14400,
		'HNC' => -21600,
		'HNE' => -18000,
		'HNP' => -28800,
		'HNR' => -25200,
		'HNT' => -12600,
		'HNY' => -32400,
		'IRDT' => 16200,
		'IRKST' => 32400,
		'IRKT' => 28800,
		'IRST' => 12600,
		'JFDT' => -10800,
		'JFST' => -14400,
		'JST' => 32400,
		'KGST' => 21600,
		'KGT' => 18000,
		'KOST' => 39600,
		'KOVST' => 28800,
		'KOVT' => 25200,
		'KRAST' => 28800,
		'KRAT' => 25200,
		'KST' => 32400,
		'LHDT' => 39600,
		'LHST' => 37800,
		'LINT' => 50400,
		'LKT' => 21600,
		'MAGST' => 43200,
		'MAGT' => 39600,
		'MAWT' => 21600,
		'MDT' => -21600,
		'MESZ' => 7200,
		'MEZ' => 3600,
		'MHT' => 43200,
		'MIT' => -34200,
		'MNST' => 32400,
		'MSDT' => 14400,
		'MSST' => 10800,
		'MST' => -25200,
		'MUT' => 14400,
		'MVT' => 18000,
		'MYT' => 28800,
		'NCT' => 39600,
		'NDT' => -9000,
		'NFT' => 41400,
		'NMIT' => 36000,
		'NOVST' => 25200,
		'NOVT' => 21600,
		'NPT' => 20700,
		'NRT' => 43200,
		'NST' => -12600,
		'NUT' => -39600,
		'NZDT' => 46800,
		'NZST' => 43200,
		'OMSST' => 25200,
		'OMST' => 21600,
		'PDT' => -25200,
		'PET' => -18000,
		'PETST' => 46800,
		'PETT' => 43200,
		'PGT' => 36000,
		'PHOT' => 46800,
		'PHT' => 28800,
		'PKT' => 18000,
		'PMDT' => -7200,
		'PMST' => -10800,
		'PONT' => 39600,
		'PST' => -28800,
		'PWT' => 32400,
		'PYST' => -10800,
		'PYT' => -14400,
		'RET' => 14400,
		'ROTT' => -10800,
		'SAMST' => 18000,
		'SAMT' => 14400,
		'SAST' => 7200,
		'SBT' => 39600,
		'SCDT' => 46800,
		'SCST' => 43200,
		'SCT' => 14400,
		'SEST' => 3600,
		'SGT' => 28800,
		'SIT' => 28800,
		'SRT' => -10800,
		'SST' => -39600,
		'SYST' => 10800,
		'SYT' => 7200,
		'TFT' => 18000,
		'THAT' => -36000,
		'TJT' => 18000,
		'TKT' => -36000,
		'TMT' => 18000,
		'TOT' => 46800,
		'TPT' => 32400,
		'TRUT' => 36000,
		'TVT' => 43200,
		'TWT' => 28800,
		'UYST' => -7200,
		'UYT' => -10800,
		'UZT' => 18000,
		'VET' => -14400,
		'VLAST' => 39600,
		'VLAT' => 36000,
		'VOST' => 21600,
		'VUT' => 39600,
		'WAST' => 7200,
		'WAT' => 3600,
		'WDT' => 32400,
		'WEST' => 3600,
		'WFT' => 43200,
		'WIB' => 25200,
		'WIT' => 32400,
		'WITA' => 28800,
		'WKST' => 18000,
		'WST' => 28800,
		'YAKST' => 36000,
		'YAKT' => 32400,
		'YAPT' => 36000,
		'YEKST' => 21600,
		'YEKT' => 18000,
	);

/**
	 * Cached PCRE for SimplePie_Parse_Date::$day
	 *
	 * @access protected
	 * @var string
	 */
	var $day_pcre;

/**
	 * Cached PCRE for SimplePie_Parse_Date::$month
	 *
	 * @access protected
	 * @var string
	 */
	var $month_pcre;

/**
	 * Array of user-added callback methods
	 *
	 * @access private
	 * @var array
	 */
	var $built_in = array();

/**
	 * Array of user-added callback methods
	 *
	 * @access private
	 * @var array
	 */
	var $user = array();

/**
	 * Create new SimplePie_Parse_Date object, and set self::day_pcre,
	 * self::month_pcre, and self::built_in
	 *
	 * @access private
	 */
	public function __construct()
	{
		$this->day_pcre = '(' . implode(array_keys($this->day), '|') . ')';
		$this->month_pcre = '(' . implode(array_keys($this->month), '|') . ')';

static $cache;
		if (!isset($cache[get_class($this)]))
		{
			$all_methods = get_class_methods($this);

foreach ($all_methods as $method)
			{
				if (strtolower(substr($method, 0, 5)) === 'date_')
				{
					$cache[get_class($this)][] = $method;
				}
			}
		}

foreach ($cache[get_class($this)] as $method)
		{
			$this->built_in[] = $method;
		}
	}

/**
	 * Get the object
	 *
	 * @access public
	 */
	public static function get()
	{
		static $object;
		if (!$object)
		{
			$object = new SimplePie_Parse_Date;
		}
		return $object;
	}

/**
	 * Parse a date
	 *
	 * @final
	 * @access public
	 * @param string $date Date to parse
	 * @return int Timestamp corresponding to date string, or false on failure
	 */
	public function parse($date)
	{
		foreach ($this->user as $method)
		{
			if (($returned = call_user_func($method, $date)) !== false)
			{
				return $returned;
			}
		}

foreach ($this->built_in as $method)
		{
			if (($returned = call_user_func(array($this, $method), $date)) !== false)
			{
				return $returned;
			}
		}

return false;
	}

/**
	 * Add a callback method to parse a date
	 *
	 * @final
	 * @access public
	 * @param callable $callback
	 */
	public function add_callback($callback)
	{
		if (is_callable($callback))
		{
			$this->user[] = $callback;
		}
		else
		{
			trigger_error('User-supplied function must be a valid callback', E_USER_WARNING);
		}
	}

/**
	 * Parse a superset of W3C-DTF (allows hyphens and colons to be omitted, as
	 * well as allowing any of upper or lower case "T", horizontal tabs, or
	 * spaces to be used as the time seperator (including more than one))
	 *
	 * @access protected
	 * @return int Timestamp
	 */
	public function date_w3cdtf($date)
	{
		static $pcre;
		if (!$pcre)
		{
			$year = '([0-9]{4})';
			$month = $day = $hour = $minute = $second = '([0-9]{2})';
			$decimal = '([0-9]*)';
			$zone = '(?:(Z)|([+\-])([0-9]{1,2}):?([0-9]{1,2}))';
			$pcre = '/^' . $year . '(?:-?' . $month . '(?:-?' . $day . '(?:[Tt\x09\x20]+' . $hour . '(?::?' . $minute . '(?::?' . $second . '(?:.' . $decimal . ')?)?)?' . $zone . ')?)?)?$/';
		}
		if (preg_match($pcre, $date, $match))
		{
			/*
			Capturing subpatterns:
			1: Year
			2: Month
			3: Day
			4: Hour
			5: Minute
			6: Second
			7: Decimal fraction of a second
			8: Zulu
			9: Timezone ±
			10: Timezone hours
			11: Timezone minutes
			*/

// Fill in empty matches
			for ($i = count($match); $i <= 3; $i++)
			{
				$match[$i] = '1';
			}

for ($i = count($match); $i <= 7; $i++)
			{
				$match[$i] = '0';
			}

// Numeric timezone
			if (isset($match[9]) && $match[9] !== '')
			{
				$timezone = $match[10] * 3600;
				$timezone += $match[11] * 60;
				if ($match[9] === '-')
				{
					$timezone = 0 - $timezone;
				}
			}
			else
			{
				$timezone = 0;
			}

// Convert the number of seconds to an integer, taking decimals into account
			$second = round($match[6] + $match[7] / pow(10, strlen($match[7])));

return gmmktime($match[4], $match[5], $second, $match[2], $match[3], $match[1]) - $timezone;
		}
		else
		{
			return false;
		}
	}

/**
	 * Remove RFC822 comments
	 *
	 * @access protected
	 * @param string $data Data to strip comments from
	 * @return string Comment stripped string
	 */
	public function remove_rfc2822_comments($string)
	{
		$string = (string) $string;
		$position = 0;
		$length = strlen($string);
		$depth = 0;

$output = '';

while ($position < $length && ($pos = strpos($string, '(', $position)) !== false)
		{
			$output .= substr($string, $position, $pos - $position);
			$position = $pos + 1;
			if ($string[$pos - 1] !== '\\')
			{
				$depth++;
				while ($depth && $position < $length)
				{
					$position += strcspn($string, '()', $position);
					if ($string[$position - 1] === '\\')
					{
						$position++;
						continue;
					}
					elseif (isset($string[$position]))
					{
						switch ($string[$position])
						{
							case '(':
								$depth++;
								break;

case ')':
								$depth--;
								break;
						}
						$position++;
					}
					else
					{
						break;
					}
				}
			}
			else
			{
				$output .= '(';
			}
		}
		$output .= substr($string, $position);

return $output;
	}

/**
	 * Parse RFC2822's date format
	 *
	 * @access protected
	 * @return int Timestamp
	 */
	public function date_rfc2822($date)
	{
		static $pcre;
		if (!$pcre)
		{
			$wsp = '[\x09\x20]';
			$fws = '(?:' . $wsp . '+|' . $wsp . '*(?:\x0D\x0A' . $wsp . '+)+)';
			$optional_fws = $fws . '?';
			$day_name = $this->day_pcre;
			$month = $this->month_pcre;
			$day = '([0-9]{1,2})';
			$hour = $minute = $second = '([0-9]{2})';
			$year = '([0-9]{2,4})';
			$num_zone = '([+\-])([0-9]{2})([0-9]{2})';
			$character_zone = '([A-Z]{1,5})';
			$zone = '(?:' . $num_zone . '|' . $character_zone . ')';
			$pcre = '/(?:' . $optional_fws . $day_name . $optional_fws . ',)?' . $optional_fws . $day . $fws . $month . $fws . $year . $fws . $hour . $optional_fws . ':' . $optional_fws . $minute . '(?:' . $optional_fws . ':' . $optional_fws . $second . ')?' . $fws . $zone . '/i';
		}
		if (preg_match($pcre, $this->remove_rfc2822_comments($date), $match))
		{
			/*
			Capturing subpatterns:
			1: Day name
			2: Day
			3: Month
			4: Year
			5: Hour
			6: Minute
			7: Second
			8: Timezone ±
			9: Timezone hours
			10: Timezone minutes
			11: Alphabetic timezone
			*/

// Find the month number
			$month = $this->month[strtolower($match[3])];

// Numeric timezone
			if ($match[8] !== '')
			{
				$timezone = $match[9] * 3600;
				$timezone += $match[10] * 60;
				if ($match[8] === '-')
				{
					$timezone = 0 - $timezone;
				}
			}
			// Character timezone
			elseif (isset($this->timezone[strtoupper($match[11])]))
			{
				$timezone = $this->timezone[strtoupper($match[11])];
			}
			// Assume everything else to be -0000
			else
			{
				$timezone = 0;
			}

// Deal with 2/3 digit years
			if ($match[4] < 50)
			{
				$match[4] += 2000;
			}
			elseif ($match[4] < 1000)
			{
				$match[4] += 1900;
			}

// Second is optional, if it is empty set it to zero
			if ($match[7] !== '')
			{
				$second = $match[7];
			}
			else
			{
				$second = 0;
			}

return gmmktime($match[5], $match[6], $second, $month, $match[2], $match[4]) - $timezone;
		}
		else
		{
			return false;
		}
	}

/**
	 * Parse RFC850's date format
	 *
	 * @access protected
	 * @return int Timestamp
	 */
	public function date_rfc850($date)
	{
		static $pcre;
		if (!$pcre)
		{
			$space = '[\x09\x20]+';
			$day_name = $this->day_pcre;
			$month = $this->month_pcre;
			$day = '([0-9]{1,2})';
			$year = $hour = $minute = $second = '([0-9]{2})';
			$zone = '([A-Z]{1,5})';
			$pcre = '/^' . $day_name . ',' . $space . $day . '-' . $month . '-' . $year . $space . $hour . ':' . $minute . ':' . $second . $space . $zone . '$/i';
		}
		if (preg_match($pcre, $date, $match))
		{
			/*
			Capturing subpatterns:
			1: Day name
			2: Day
			3: Month
			4: Year
			5: Hour
			6: Minute
			7: Second
			8: Timezone
			*/

// Month
			$month = $this->month[strtolower($match[3])];

// Character timezone
			if (isset($this->timezone[strtoupper($match[8])]))
			{
				$timezone = $this->timezone[strtoupper($match[8])];
			}
			// Assume everything else to be -0000
			else
			{
				$timezone = 0;
			}

// Deal with 2 digit year
			if ($match[4] < 50)
			{
				$match[4] += 2000;
			}
			else
			{
				$match[4] += 1900;
			}

return gmmktime($match[5], $match[6], $match[7], $month, $match[2], $match[4]) - $timezone;
		}
		else
		{
			return false;
		}
	}

/**
	 * Parse C99's asctime()'s date format
	 *
	 * @access protected
	 * @return int Timestamp
	 */
	public function date_asctime($date)
	{
		static $pcre;
		if (!$pcre)
		{
			$space = '[\x09\x20]+';
			$wday_name = $this->day_pcre;
			$mon_name = $this->month_pcre;
			$day = '([0-9]{1,2})';
			$hour = $sec = $min = '([0-9]{2})';
			$year = '([0-9]{4})';
			$terminator = '\x0A?\x00?';
			$pcre = '/^' . $wday_name . $space . $mon_name . $space . $day . $space . $hour . ':' . $min . ':' . $sec . $space . $year . $terminator . '$/i';
		}
		if (preg_match($pcre, $date, $match))
		{
			/*
			Capturing subpatterns:
			1: Day name
			2: Month
			3: Day
			4: Hour
			5: Minute
			6: Second
			7: Year
			*/

$month = $this->month[strtolower($match[2])];
			return gmmktime($match[4], $match[5], $match[6], $month, $match[3], $match[7]);
		}
		else
		{
			return false;
		}
	}

/**
	 * Parse dates using strtotime()
	 *
	 * @access protected
	 * @return int Timestamp
	 */
	public function date_strtotime($date)
	{
		$strtotime = strtotime($date);
		if ($strtotime === -1 || $strtotime === false)
		{
			return false;
		}
		else
		{
			return $strtotime;
		}
	}
}

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