PHP does not use regular expressions to verify true*_PHP tutorial

Let’s look at the code directly. It’s a very simple PHP class

Copy the code The code is as follows:

$IDCard = new IDCard();
var_dump($IDCard::isCard($_GET['card']));

/**
* ID card processing class
*/
class IDCard {

//Verify whether the ID card is correct
public static function isCard($card) {
$card = self::to18Card($card);
if (strlen($card) != 18) {
                           ; == strtoupper(substr($card, 17, 1)));
}


//Format the 15-digit ID number to 18 digits
public static function to18Card($ card) {
$card = trim($card);

if (strlen($card) == 18) {
return $card;
}

if (strlen($card) != 15) {
                                                                                     Encoding
       if (array_search(substr($card, 12, 3), array('996', '997', '998', '999')) !== false) {                                                                               . ($card, 6, 9);
                                                                                       Calculate the ID card verification code according to the national standard gb 11643-1999
private static function getVerifyNum($cardBase) {
if (strlen($cardBase) != 17) {
return false;
}
// Weighting factor
$factor = array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2) ;

                                                                                                                                                                                                                                                                                    Corresponding value of the verification code '5', '4', '3', '2');

$checksum = 0;
for ($i = 0; $i < strlen($cardBase); $i++ ) {
                 $checksum += substr($cardBase, $i, 1) * $factor[$i];                                               = $verify_number_list[$mod];

            return $verify_number;



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Let’s look at the code directly. A very simple PHP class copy code is as follows: ?php $IDCard = new IDCard( ); var_dump($IDCard::isCard($_GET['card'])); /*** ID card processing class*/ class IDC...