<?

	function generateRandomString($length = 10, $letters = '1234567890qwertyuiopasdfghjklzxcvbnm'){
    $s = '';
    $lettersLength = strlen($letters)-1;

    for($i = 0 ; $i < $length ; $i++)
    {
        $s .= $letters[rand(0,$lettersLength)];
    }

    return $s;
}

echo generateRandomString();

	?>