1: <?php
 2: 
 3: /**
 4:  * Jyxo PHP Library
 5:  *
 6:  * LICENSE
 7:  *
 8:  * This source file is subject to the new BSD license that is bundled
 9:  * with this package in the file license.txt.
10:  * It is also available through the world-wide-web at this URL:
11:  * https://github.com/jyxo/php/blob/master/license.txt
12:  */
13: 
14: namespace Jyxo\Input\Validator;
15: 
16: /**
17:  * Validates if the given value is a valid date in the YYYY-MM-DD form.
18:  *
19:  * @category Jyxo
20:  * @package Jyxo\Input
21:  * @subpackage Validator
22:  * @copyright Copyright (c) 2005-2011 Jyxo, s.r.o.
23:  * @license https://github.com/jyxo/php/blob/master/license.txt
24:  * @author Jan Pěček
25:  */
26: class IsDate extends \Jyxo\Input\Validator\AbstractValidator
27: {
28:     /**
29:      * Validates a value.
30:      *
31:      * @param mixed $value Input value
32:      * @return boolean
33:      */
34:     public function isValid($value)
35:     {
36:         $value = (string) $value;
37: 
38:         // Form check
39:         if (!preg_match('~^(\d{4})-(\d{2})-(\d{2})$~', $value, $matches)) {
40:             return false;
41:         }
42: 
43:         list(, $year, $month, $day) = $matches;
44: 
45:         // Date validity check
46:         if (!checkdate($month, $day, $year)) {
47:             return false;
48:         }
49: 
50:         return true;
51:     }
52: }
53: