if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $result = $tree->classify([
        "pogoda" => $_REQUEST['outlook'],
        "wietrznie" => $_REQUEST['windy'],
        "wilgotnosc" => $_REQUEST['humidity'],
        "temperatura" => $_REQUEST['temerature'],
        "noga" => $_REQUEST['leg'],
    ]);
    if($result == "true"){
        echo "Można grać";
    } else {
        echo "Nie można grać";
    }
    exit;
}