PHP关于验证

1. 验证身份证号码

       /**
        * 验证身份证号
        * @param $vStr
        * @return bool
        */
       private function _isCreditNo($vStr)
       {
           $vCity = array(
                   '11','12','13','14','15','21','22',
                   '23','31','32','33','34','35','36',
                   '37','41','42','43','44','45','46',
                   '50','51','52','53','54','61','62',
                   '63','64','65','71','81','82','91'
           );
   
           if (!preg_match('/^([\d]{17}[xX\d]|[\d]{15})$/', $vStr)) return false;
   
           if (!in_array(substr($vStr, 0, 2), $vCity)) return false;
   
           $vStr = preg_replace('/[xX]$/i', 'a', $vStr);
           $vLength = strlen($vStr);
   
           if ($vLength == 18)
           {
               $vBirthday = substr($vStr, 6, 4) . '-' . substr($vStr, 10, 2) . '-' . substr($vStr, 12, 2);
           }
           else
           {
               $vBirthday = '19' . substr($vStr, 6, 2) . '-' . substr($vStr, 8, 2) . '-' . substr($vStr, 10, 2);
           }
   
           if (date('Y-m-d', strtotime($vBirthday)) != $vBirthday) return false;
           if ($vLength == 18)
           {
               $vSum = 0;
   
               for ($i = 17 ; $i >= 0 ; $i--)
               {
                   $vSubStr = substr($vStr, 17 - $i, 1);
                   $vSum += (pow(2, $i) % 11) * (($vSubStr == 'a') ? 10 : intval($vSubStr , 11));
               }
   
               if($vSum % 11 != 1) return false;
           }
   
           return true;
       }

2. 其他