php不用正则验证真假身份证 身份证号码验证

来源URL：http://www.jb51.net/article/42821.htm

<?php $IDCard = new IDCard(); var_dump($IDCard::isCard($_GET['card'])); /**  * 身份证处理类  */class IDCard {     //检证身份证是否正确     public static function isCard($card) {         $card = self::to18Card($card);         if (strlen($card) != 18) {             return false;         }         $cardBase = substr($card, 0, 17);         return (self::getVerifyNum($cardBase) == strtoupper(substr($card, 17, 1)));     }       //格式化15位身份证号码为18位     public static function to18Card($card) {         $card = trim($card);         if (strlen($card) == 18) {             return $card;         }         if (strlen($card) != 15) {             return false;         }         // 如果身份证顺序码是996 997 998 999，这些是为百岁以上老人的特殊编码         if (array_search(substr($card, 12, 3), array('996', '997', '998', '999')) !== false) {             $card = substr($card, 0, 6) . '18' . substr($card, 6, 9);         } else {             $card = substr($card, 0, 6) . '19' . substr($card, 6, 9);         }         $card = $card . self::getVerifyNum($card);         return $card;     }     // 计算身份证校验码，根据国家标准gb 11643-1999     private static function getVerifyNum($cardBase) {         if (strlen($cardBase) != 17) {             return false;         }         // 加权因子         $factor = array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);         // 校验码对应值         $verify_number_list = array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2');         $checksum = 0;         for ($i = 0; $i < strlen($cardBase); $i++) {             $checksum += substr($cardBase, $i, 1) * $factor[$i];         }         $mod = $checksum % 11;         $verify_number = $verify_number_list[$mod];         return $verify_number;     } }