1: <?php
 2: /**
 3:  * Wei Framework
 4:  *
 5:  * @copyright   Copyright (c) 2008-2015 Twin Huang
 6:  * @license     http://opensource.org/licenses/mit-license.php MIT License
 7:  */
 8: 
 9: namespace Wei\Validator;
10: 
11: /**
12:  * Check if the input is valid Chinese identity card
13:  *
14:  * @author      Twin Huang <twinhuang@qq.com>
15:  */
16: class IdCardCn extends BaseValidator
17: {
18:     protected $invalidMessage = '%name% must be valid Chinese identity card';
19: 
20:     protected $negativeMessage = '%name% must not be valid Chinese identity card';
21: 
22:     /**
23:      * {@inheritdoc}
24:      */
25:     protected function doValidate($input)
26:     {
27:         if (!$this->isString($input)) {
28:             $this->addError('notString');
29:             return false;
30:         }
31: 
32:         $len = strlen($input);
33:         if ($len != 15 && $len != 18) {
34:             $this->addError('invalid');
35:             return false;
36:         }
37: 
38:         // Upgrade to 18-digit
39:         if ($len == 15) {
40:             $input = substr($input, 0, 6) . '19' . substr($input, 6);
41:         }
42: 
43:         // The 1 to 17-digit must be digit
44:         if (!preg_match('/^([0-9]+)$/', substr($input, 0, -1))) {
45:             $this->addError('invalid');
46:             return false;
47:         }
48: 
49:         // Verify date of birth
50:         $month  = substr($input, 10, 2);
51:         $day    = substr($input, 12, 2);
52:         $year   = substr($input, 6, 4);
53:         if (!checkdate($month, $day, $year)) {
54:             $this->addError('invalid');
55:             return false;
56:         }
57: 
58:         // Verify checksum
59:         if (isset($input[17])) {
60:             $checksum = $this->calcChecksum($input);
61:             if (strtoupper($input[17]) !== $checksum) {
62:                 $this->addError('invalid');
63:                 return false;
64:             }
65:         }
66: 
67:         return true;
68:     }
69: 
70:     /**
71:       * Calculate the final digit of id card
72:       *
73:       * @param string $input The 17 or 18-digit code
74:       * @return string
75:       */
76:     public function calcChecksum($input)
77:     {
78:         $wi = array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);
79:         $sum = 0;
80: 
81:         for ($i = 16; $i >= 0; $i--) {
82:             $sum += $input[$i] * $wi[$i];
83:         }
84: 
85:         $checksum = (12 - $sum % 11) % 11;
86: 
87:         return $checksum == 10 ? 'X' : (string)$checksum;
88:     }
89: }
90: