Date.php

gehe zur Dokumentation dieser Datei

<?php
class SimplePie_Parse_Date
{
        var $date;

        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,
        );

        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,
        );

        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,
                '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,
        );

        var $day_pcre;

        var $month_pcre;

        var $built_in = array();

        var $user = array();

        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;
                }
        }

        public static function get()
        {
                static $object;
                if (!$object)
                {
                        $object = new SimplePie_Parse_Date;
                }
                return $object;
        }

        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;
        }

        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);
                }
        }

        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;
                }
        }

        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;
        }

        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;
                }
        }

        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;
                }
        }

        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;
                }
        }

        public function date_strtotime($date)
        {
                $strtotime = strtotime($date);
                if ($strtotime === -1 || $strtotime === false)
                {
                        return false;
                }
                else
                {
                        return $strtotime;
                }
        }
}