ACC SHELL

<?php

/**
 * This file is part of the Nette Framework (http://nette.org)
 *
 * Copyright (c) 2004 David Grudl (http://davidgrudl.com)
 *
 * For the full copyright and license information, please view
 * the file license.txt that was distributed with this source code.
 */

namespace Nette;

use Nette;


/**
 * DateTime with serialization and timestamp support for PHP 5.2.
 *
 * @author     David Grudl
 */
class DateTime extends \DateTime
{
	/** minute in seconds */
	const MINUTE = 60;

	/** hour in seconds */
	const HOUR = 3600;

	/** day in seconds */
	const DAY = 86400;

	/** week in seconds */
	const WEEK = 604800;

	/** average month in seconds */
	const MONTH = 2629800;

	/** average year in seconds */
	const YEAR = 31557600;


	/**
	 * DateTime object factory.
	 * @param  string|int|\DateTime
	 * @return DateTime
	 */
	public static function from($time)
	{
		if ($time instanceof \DateTime) {
			return new static($time->format('Y-m-d H:i:s'), $time->getTimezone());

		} elseif (is_numeric($time)) {
			if ($time <= self::YEAR) {
				$time += time();
			}
			return new static(date('Y-m-d H:i:s', $time));

		} else { // textual or NULL
			return new static($time);
		}
	}


	public function __toString()
	{
		return $this->format('Y-m-d H:i:s');
	}


	public function modifyClone($modify = '')
	{
		$dolly = clone $this;
		return $modify ? $dolly->modify($modify) : $dolly;
	}


	}