Question

I need to create a auto incrementing string similar to this randomly via php. The string is like this. So what i need is a mix of numbers and letter that is randomally generated and doesnt have to be sequential just as long as its random like this 823N9823 and it has 8 characters max

Answer 1

If the characters don’t need to be unique:

function randomString($length = 8, $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789') {
    $randomString = '';
    $numofChars = strlen($chars);
    while (--$length) {
        $randomString .= $chars[mt_rand(0, $numofChars - 1)];
    }
    return $randomString;
}

If the characters must be unique:

function randomString($length = 8, $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789') {
    return substr(str_shuffle($chars), 0, 8);
}