[GET] PHP Spinner Syntax Parser Script

function spin($x, $p1 = -1){
    if($p1 === false)
        return $x;
    $p2 = strpos($x, "}", $p1 + 1);
    $p3 = strpos($x, "{", $p1 + 1);
    if($p2 > $p3 && $p3 !== false || $p1 == -1)
        return spin($x, $p3);
    $a = explode("|", substr($x, $p1 + 1, $p2 - $p1 - 1));
    return spin(substr($x, 0, $p1) . $a[array_rand($a)] . substr($x, $p2 + 1), -1);
}

$str = "{the {quick|fast} brown fox|lol} {jumps {over|under}|leaps {through|on}} the lazy dog{.|!}";
echo spin($str);