Dom's (Myrax) string builder implementation in PHP

function adilsRandomString() {
    $alphanumerics = ’0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ’;
    $result = ”;
    for ($x = 0; $x < 32; $x++) {
        $result .= $alphanumerics [mt_rand(0, strlen($alphanumerics))];
    }
    return $result;
}