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full-text-rss/libraries/simplepie/library/SimplePie/Parse/Date.php

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Full-Text RSS 2.9.5
2013-04-18 14:11:06 +00:00
<?php
/**
* SimplePie
*
* A PHP-Based RSS and Atom Feed Framework.
* Takes the hard work out of managing a complete RSS/Atom solution.
*
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* Copyright (c) 2004-2016, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors
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* 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
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* @copyright 2004-2016 Ryan Parman, Geoffrey Sneddon, Ryan McCue
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* @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
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* @subpackage Parsing
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*/
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,
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'september' => 9,
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'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,
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'CEST' => 7200,
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'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 $method)
{
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if (($returned = call_user_func(array($this, $method), $date)) !== false)
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{
return $returned;
}
}
return false;
}
/**
* Add a callback method to parse a date
*
* @final
* @access public
* @param callback $callback
*/
public function add_callback($callback)
{
if (is_callable($callback))
{
$this->user[] = $callback;
}
else
{
trigger_error('User-supplied function must be a valid callback', E_USER_WARNING);
}
}
/**
* Parse a superset of W3C-DTF (allows hyphens and colons to be omitted, as
* well as allowing any of upper or lower case "T", horizontal tabs, or
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* spaces to be used as the time separator (including more than one))
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*
* @access protected
* @return int Timestamp
*/
public function date_w3cdtf($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
{
$timezone = 0;
}
// Convert the number of seconds to an integer, taking decimals into account
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$second = round((int)$match[6] + (int)$match[7] / pow(10, strlen($match[7])));
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return gmmktime($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 = $pos + 1;
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if ($pos === 0 || $string[$pos - 1] !== '\\')
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{
$depth++;
while ($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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