I have this info that creates the upload form

<form enctype="multipart/form-data" action="upload.php" method="POST"> Please choose a file: <input name="uploaded" type="file" /><br /> <input type="submit" value="Upload" /> </form>

I also have this info that i have to create a .php file with

<?php 
$target = "upload/"; 
$target = $target . basename( $_FILES['uploaded']['name']) ; 
$ok=1; 
if(move_uploaded_file($_FILES['uploaded']['tmp_name'], $target)) 
{ 
echo "The file ". basename( $_FILES['uploadedfile']['name']). " has been uploaded"; 
} 
else { 
echo "Sorry, there was a problem uploading your file."; 
} 
?>
where do i place the upload.php file so the form sends the data to it