function idcard_verify_number($idcard_base){if (strlen($idcard_base) != 17){return false;}$factor = array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2); //debug 加权因子$verify_number_list = array(‘1‘, ‘0‘, ‘X‘, ‘9‘, ‘8‘, ‘7‘, ‘6‘, ‘5‘, ‘4‘, ‘3‘, ‘2‘); //debug 校验码对应值$checksum = 0;for ($i = 0; $i < strlen($idcard_base); $i++){$checksum += substr($idcard_base, $i, 1) * $factor[$i];}$mod = $checksum % 11;$verify_number = $verify_number_list[$mod];return $verify_number;}function idcard_15to18($idcard){if (strlen($idcard) != 15){return false;}else{// 如果身份证顺序码是996 997 998 999，这些是为百岁以上老人的特殊编码if (array_search(substr($idcard, 12, 3), array(‘996‘, ‘997‘, ‘998‘, ‘999‘)) !== false){$idcard = substr($idcard, 0, 6) . ‘18‘. substr($idcard, 6, 9);}else{$idcard = substr($idcard, 0, 6) . ‘19‘. substr($idcard, 6, 9);}}$idcard = $idcard . idcard_verify_number($idcard);return $idcard;}function idcard_checksum18($idcard){if (strlen($idcard) != 18){ return false; }$idcard_base = substr($idcard, 0, 17);if (idcard_verify_number($idcard_base) != strtoupper(substr($idcard, 17, 1))){return false;}else{return true;}}