uploading a file via php - i need some simple code

I am having the worst trouble trying to write a tiny simple script that will upload a file. Below is my code - can anyone tell me why it's not working.... HTML <form name="form1" method="post" action="upload.php" enctype="multipart/form-data"> <input type="hidden" name="MAX_FILE_SIZE" value="1000"> <input type="file" name="userfile"> <input type="submit" name="Submit" value="Submit"> </form> PHP (upload.php) $filename = "/test.txt"; if (!move_uploaded_file($userfile, $filename)) { echo "something barfed."; exit; } else { echo "uploaded."; } Something is most likely wrong with the $filename variable. I don't know what exactly to put in there. All I want to do is upload a file and then move/copy it to a specific directory. What am I doing wrong?!?! THANKS!!