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 a birth number.
18:  *
19:  * Taken from David Grudl's http://latrine.dgx.cz/jak-overit-platne-ic-a-rodne-cislo
20:  *
21:  * @category Jyxo
22:  * @package Jyxo\Input
23:  * @subpackage Validator
24:  * @copyright Copyright (c) 2005-2011 Jyxo, s.r.o.
25:  * @license https://github.com/jyxo/php/blob/master/license.txt
26:  * @author Jaroslav Hanslík
27:  */
28: class IsBirthNumber extends \Jyxo\Input\Validator\AbstractValidator
29: {
30:     /**
31:      * Validates a value.
32:      *
33:      * @param mixed $value Input value
34:      * @return boolean
35:      */
36:     public function isValid($value)
37:     {
38:         $value = (string) $value;
39: 
40:         if (!preg_match('~^(\d{2})(\d{2})(\d{2})[ /]*(\d{3})(\d?)$~', trim($value), $matches)) {
41:             return false;
42:         }
43: 
44:         list(, $year, $month, $day, $ext, $control) = $matches;
45: 
46:         // Until 1954 9 numbers were used; can not check
47:         if ('' === $control) {
48:             if ($year >= 54) {
49:                 return false;
50:             } else {
51:                 return true;
52:             }
53:         }
54: 
55:         // Control number
56:         $mod = ($year . $month . $day . $ext) % 11;
57:         // Exception for ca 1000 numbers; no such numbers since 1985
58:         if (10 === $mod) {
59:             $mod = 0;
60:         }
61:         if ((int) $control !== $mod) {
62:             return false;
63:         }
64: 
65:         // Date check
66:         $year += $year < 54 ? 2000 : 1900;
67: 
68:         // 20, 50 or 70 can be added to month number
69:         if (($month > 70) && ($year > 2003)) {
70:             // Females since 2004 if all 4-digit extension combinations were used that day
71:             $month -= 70;
72:         } elseif ($month > 50) {
73:             // Females
74:             $month -= 50;
75:         } elseif (($month > 20) && ($year > 2003)) {
76:             // Males since 2004 if all 4-digit extension combinations were used that day
77:             $month -= 20;
78:         }
79: 
80:         // Date check
81:         if (!checkdate($month, $day, $year)) {
82:             return false;
83:         }
84: 
85:         // Ok
86:         return true;
87:     }
88: }
89: