CD Key Generator!

Key.php

// Sean Loper
// I use a template so any combination can be used, logically.
// Every X is replaced by a random character while 9 is replaced by a random number!
function randomKey()
{
    $template   = 'XX99-XX99-99XX-99XX-XXXX-99XX';
    $k = strlen($template);
    $sernum = '';
    for ($i=0; $i<$k; $i++)
    {
        switch($template[$i])
        {
            case 'X': $sernum .= chr(rand(65,90)); break;
            case '9': $sernum .= rand(0,9); break;
            case '-': $sernum .= '-';  break;
        }
    }
    return $sernum; // or echo $sernum;
}