똑같이 따라 했는데 왜 에러가 나는지 모르겠어요

<?php

switch($_SERVER['REQUEST_METHOD']){
    case 'GET':
        echo <<< 'HTML'
<form action="/"         method = 'POST' enctype="multipart/form-data">
    <input type="file" name="uploads">
    <input type="submit">
</form>
HTML;
        break;
    case 'POST':
        $file = $_FILES['uploads'];
        // $pathinfo = pathinfo($file['name']);
        // $accepts = [
        //     'png', 'jpg'
        // ];
        if(is_uploaded_file($file['tmp_name'])){
            move_uploaded_file($file['tmp_name'],dirname(__FILE__).'/uploades/'.$file['name'] );
        }
        break;
    default:
        http_response_code(404);
}