Very Simple Php File Upload

I think this is the minimum necessary to upload a file in php. First, the form, index.php:



    
    Send this file: 
    



Next, the php to accept the file, upload.php


";

if (move_uploaded_file($_FILES['userfile']['tmp_name'], $uploadfile)) {
  echo "File is valid, and was successfully uploaded.\n";
} else {
   echo "Upload failed";
}

echo "
";
echo '
';
echo 'Here is some more debugging info:';
print_r($_FILES);
print "
";

?>