Function for verifying the validity of the ID card in PHP

This article explains how to verify the validity of the ID card in PHP by using code.

Function is_idcard ($ id) {$ id = strtoupper ($ id); $ regx = "/(^ \ d {15} $) | (^ \ d {17} ([0-9] | X) $)/"; $ arr_split = array (); if (! Preg_match ($ regx, $ id) {return FALSE;} if (15 = strlen ($ id )) // Check 15 bits {$ regx = "/^ (\ d {6}) + (\ d {2}) + (\ d {2 }) + (\ d {2}) + (\ d {3}) $/"; @ preg_match ($ regx, $ id, $ arr_split ); // check whether the birthday date is correct $ dtm_birth = "19 ". $ arr_split [2]. '/'. $ arr_split [3]. '/'. $ arr_split [4]; if (! Strtotime ($ dtm_birth) {return FALSE;} else {return TRUE ;}} else // Check 18 bits {$ regx = "/^ (\ d {6 }) + (\ d {4}) + (\ d {2}) + (\ d {2}) + (\ d {3 }) ([0-9] | X) $/"; @ preg_match ($ regx, $ id, $ arr_split); $ dtm_birth = $ arr_split [2]. '/'. $ arr_split [3]. '/'. $ arr_split [4]; if (! Strtotime ($ dtm_birth) // check whether the birthday date is correct {return FALSE;} else {// check whether the 18-digit ID card verification code is correct. // The checkpoint is generated according to ISO 7064: 1983.MOD 11-2. X can be considered as a number 10. $ Arr_int = array (7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2 ); $ arr_ch = array ('1', '0', 'X', '9', '8', '7', '6', '5 ', '4', '3', '2'); $ sign = 0; for ($ I = 0; $ I <17; $ I ++) {$ B = (int) $ id {$ I}; $ w = $ arr_int [$ I]; $ sign + = $ B * $ w ;} $ n = $ sign % 11; $ val_num = $ arr_ch [$ n]; if ($ val_num! = Substr ($ id, 17, 1) {return FALSE;} else {return TRUE ;}}}}

The above is the details of the function used to verify the validity of the ID card in PHP. For more information, see other related articles in the first PHP community!