number of digits in visa credit card

PHP uses the Luhn algorithm to verify whether the credit card number is valid. PHP uses the Luhn algorithm to verify whether a credit card number is valid. This article mainly describes how PHP uses the Luhn algorithm to verify wh

This article mainly introduced the PHP verification credit card number is correct function, this article directly gives the realization code, needs the friend may refer to under You can use the following PHP function to verify that a card number is a

1. Native JS Writing !function () { document.getElementById (' Bankcard '). onkeyup = function (event) { var v = this.value; if (/\s{5}/.test (v)) { this.value = v.replace (/\s/g, '). Replace (/(. { 4})/g, "$";} } ;} (); 2. jquery notation The above is a small set to the introduction of JS to fill out the bank card number of every 4

PHP uses the Luhn algorithm to verify whether the credit card number is valid. PHP uses the Luhn algorithm to verify whether the credit card number is valid. the luhn algorithm in this article describes how PHP uses the Luhn algor

Applies to the management of archives in OA projects.1. Calculate the birth date, age, and gender (18 digits) based on the ID card number)Copy codeThe Code is as follows:// Obtain the input ID numberVar UUserCard = $ ("# UUserCard"). val ();// Obtain the Date of birth// UUserCard. substring (6, 10) + "-" + UUserCard. substring (10, 12) + "-" + UUserCard. substrin

1. Calculate the birth date, age, and gender (18 digits) based on the ID card number)Copy codeThe Code is as follows:// Obtain the input ID numberVar UUserCard = $ ("# UUserCard"). val ();// Obtain the Date of birth// UUserCard. substring (6, 10) + "-" + UUserCard. substring (10, 12) + "-" + UUserCard. substring (12, 14 );// Obtain genderIf (parseInt (UUserCard.

1 /**2 * Verify that the bank card number is a credit card3 * @param $cardnumber4 * @return BOOL5 */6 functionValidatecard ($cardnumber){7 $cardnumber=Preg_replace("/\d|\s/", "",$cardnumber);8 $cardlength=strlen($cardnumber);if($cardlength? =n){9 $parity=$cardlength%;Ten $sum=0; One for($i= 0;$i$cardle

Applies to the management of archives in OA projects.1. Calculate the birth date, age, and gender (18 digits) based on the ID card number) // Obtain the input ID card number var uusercard =$ ("# uusercard "). val (); // get the date of birth // uusercard. substring (6, 10) +

1. Calculate the birth date, age, and gender (18 digits) based on the ID card number) Copy codeThe Code is as follows: // obtain the ID card number Var UUserCard = $ ("# UUserCard"). val (); // Obtain the Date of birth // UUserCard. substring (6, 10) + "-" + UUserCard. subst