1: <?php
  2: 
  3: /**
  4:  * This file is part of the Nette Framework (https://nette.org)
  5:  *
  6:  * Copyright (c) 2004 David Grudl (http://davidgrudl.com)
  7:  *
  8:  * For the full copyright and license information, please view
  9:  * the file license.txt that was distributed with this source code.
 10:  * @package Nette
 11:  */
 12: 
 13: 
 14: 
 15: /**
 16:  * DateTime with serialization and timestamp support for PHP 5.2.
 17:  *
 18:  * @author     David Grudl
 19:  * @package Nette
 20:  */
 21: class NDateTime53 extends DateTime
 22: {
 23:     /** minute in seconds */
 24:     const MINUTE = 60;
 25: 
 26:     /** hour in seconds */
 27:     const HOUR = 3600;
 28: 
 29:     /** day in seconds */
 30:     const DAY = 86400;
 31: 
 32:     /** week in seconds */
 33:     const WEEK = 604800;
 34: 
 35:     /** average month in seconds */
 36:     const MONTH = 2629800;
 37: 
 38:     /** average year in seconds */
 39:     const YEAR = 31557600;
 40: 
 41: 
 42: 
 43:     /**
 44:      * DateTime object factory.
 45:      * @param  string|int|DateTime
 46:      * @return NDateTime53
 47:      */
 48:     public static function from($time)
 49:     {
 50:         if ($time instanceof DateTime) {
 51:             return clone $time;
 52: 
 53:         } elseif (is_numeric($time)) {
 54:             if ($time <= self::YEAR) {
 55:                 $time += time();
 56:             }
 57:             return new self(date('Y-m-d H:i:s', $time));
 58: 
 59:         } else { // textual or NULL
 60:             return new self($time);
 61:         }
 62:     }
 63: 
 64: 
 65:     public static function __set_state($state)
 66:     {
 67:         return new self($state['date'], new DateTimeZone($state['timezone']));
 68:     }
 69: 
 70: 
 71: 
 72:     public function __sleep()
 73:     {
 74:         $this->fix = array($this->format('Y-m-d H:i:s'), $this->getTimezone()->getName());
 75:         return array('fix');
 76:     }
 77: 
 78: 
 79: 
 80:     public function __wakeup()
 81:     {
 82:         $this->__construct($this->fix[0], new DateTimeZone($this->fix[1]));
 83:         unset($this->fix);
 84:     }
 85: 
 86: 
 87: 
 88:     public function getTimestamp()
 89:     {
 90:         return (int) $this->format('U');
 91:     }
 92: 
 93: 
 94: 
 95:     public function setTimestamp($timestamp)
 96:     {
 97:         return $this->__construct(
 98:             gmdate('Y-m-d H:i:s', $timestamp + $this->getOffset()),
 99:             new DateTimeZone($this->getTimezone()->getName()) // simply getTimezone() crashes in PHP 5.2.6
100:         );
101:     }
102: 
103: }
104: