php - Generate random activation code in PHP

Question

How to generate random activation code based on current datetime and username in PHP.

The return value should be like this, i.e:

201605021955Username

function getActivationCode($username){
$activationCode = "";        

 ....

return activationCode;
}

Answer 1

function getActivationCode($username){
    $activationCode =date('YmdHi').$username;  
    return activationCode;
}

Answer 2

您要求的不是随机的，而是：

$string = date('YmdHi') . $username;

另请查看chr函数以从随机数中获取字符（您可以从mt_rand中获取）。