cakephp/Cake/Database/Type/DateTimeType.php

<?php
/**
 * PHP Version 5.4
 *
 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 *
 * Licensed under The MIT License
 * For full copyright and license information, please see the LICENSE.txt
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 * @link          http://cakephp.org CakePHP(tm) Project
 * @since         CakePHP(tm) v 3.0.0
 * @license       MIT License (http://www.opensource.org/licenses/mit-license.php)
 */
namespace Cake\Database\Type;

use Cake\Database\Driver;
use \DateTime;

/**
 * Datetime type converter.
 *
 * Use to convert datetime instances to strings & back.
 */
class DateTimeType extends \Cake\Database\Type {

/**
 * Convert DateTime instance into strings.
 *
 * @param string|Datetime $value The value to convert.
 * @param Driver $driver The driver instance to convert with.
 * @return string
 */
	public function toDatabase($value, Driver $driver) {
		if (is_string($value)) {
			return $value;
		}
		return $value->format('Y-m-d H:i:s');
	}

/**
 * Convert strings into DateTime instances.
 *
 * @param string $value The value to convert.
 * @param Driver $driver The driver instance to convert with.
 * @return Datetime
 */
	public function toPHP($value, Driver $driver) {
		if ($value === null) {
			return null;
		}
		$value = DateTime::createFromFormat('Y-m-d H:i:s', $value);
		return $value;
	}

}