<?php
$characters = array(
"A","B","C","D","E","F","G","H","J","K","L","M","N","P","Q","R","S","T","U","V","W","X","Y","Z","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f","g","h","j","k","l","m","n","p","q","r","s","t","u","v","w","x","y","z");

$keys = array();
while(count($keys) < 15) {
     $x = mt_rand(0, count($characters)-1);
     if(!in_array($x, $keys)) {
        $keys[] = $x;
     }
 }
 foreach($keys as $key){
    $random_chars .= $characters[$key];
 }
$gamepass = base64_encode($random_chars);
?>