die('The file you attempted to upload is too large.');
// Check if we can upload to the specified path, if not DIE and inform the user.
die('You cannot upload to the specified directory, please CHMOD it to 777.');
// Upload the file to your specified path.
if(move_uploaded_file($_FILES['userfile']['tmp_name'],$upload_path . $filename))
echo 'Your file upload was successful, view the file here
'; // It worked.
echo 'There was an error during the file upload. Please try again.'; // It failed :(.