120 lines
3.5 KiB
PHP
120 lines
3.5 KiB
PHP
<?php
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/**
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* Copyright 2012-2017 Horde LLC (http://www.horde.org/)
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*
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* See the enclosed file COPYING for license information (LGPL). If you
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* did not receive this file, see http://www.horde.org/licenses/lgpl21.
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*
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* @category Horde
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* @copyright 2012-2017 Horde LLC
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* @license http://www.horde.org/licenses/lgpl21 LGPL 2.1
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* @package Imap_Client
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*/
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/**
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* A wrapper around PHP's native DateTime class that handles improperly
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* formatted dates and adds a few features missing from the base object
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* (string representation; doesn't fail on bad date input).
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*
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* @author Michael Slusarz <slusarz@horde.org>
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* @category Horde
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* @copyright 2012-2017 Horde LLC
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* @license http://www.horde.org/licenses/lgpl21 LGPL 2.1
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* @package Imap_Client
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*/
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class Horde_Imap_Client_DateTime extends DateTime
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{
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/**
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*/
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public function __construct($time = null, $tz = null)
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{
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/* See https://bugs.php.net/bug.php?id=67118 */
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$bug_67118 = (version_compare(PHP_VERSION, '5.6', '>=')) ||
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in_array(PHP_VERSION, array('5.4.29', '5.5.13'));
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$tz = new DateTimeZone('UTC');
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/* Bug #14381 Catch malformed offset - which doesn't cause
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DateTime to throw exception. */
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if (substr(rtrim($time), -5) === ' 0000') {
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$time = substr(trim($time), 0, strlen(trim($time)) - 5) . ' +0000';
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try {
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if ($bug_67118) {
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new DateTime($time, $tz);
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}
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parent::__construct($time, $tz);
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return;
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} catch (Exception $e) {}
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}
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try {
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if ($bug_67118) {
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new DateTime($time, $tz);
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}
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parent::__construct($time, $tz);
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return;
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} catch (Exception $e) {}
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/* Check for malformed day-of-week parts, usually incorrectly
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* localized. E.g. Fr, 15 Apr 2016 15:15:09 +0000 */
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if (!preg_match("/^(Mon|Tue|Wed|Thu|Fri|Sat|Sun),/", $time)) {
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$time = preg_replace("/^(\S*,)/", '', $time, 1, $i);
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if ($i) {
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try {
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if ($bug_67118) {
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new DateTime($time, $tz);
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}
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parent::__construct($time, $tz);
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return;
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} catch (Exception $e) {}
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}
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}
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/* Bug #5717 - Check for UT vs. UTC. */
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if (substr(rtrim($time), -3) === ' UT') {
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try {
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if ($bug_67118) {
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new DateTime($time . 'C', $tz);
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}
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parent::__construct($time . 'C', $tz);
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return;
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} catch (Exception $e) {}
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}
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/* Bug #9847 - Catch paranthesized timezone information at end of date
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* string. */
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$date = preg_replace("/\s*\([^\)]+\)\s*$/", '', $time, -1, $i);
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if ($i) {
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try {
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if ($bug_67118) {
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new DateTime($date, $tz);
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}
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parent::__construct($date, $tz);
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return;
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} catch (Exception $e) {}
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}
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parent::__construct('@-1', $tz);
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}
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/**
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* String representation: UNIX timestamp.
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*/
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public function __toString()
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{
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return $this->error()
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? '0'
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: strval($this->getTimestamp());
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}
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/**
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* Was this an unparseable date?
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*
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* @return boolean True if unparseable.
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*/
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public function error()
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{
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return ($this->getTimestamp() === -1);
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}
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}
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