upload_lab2.php

<?php

 if($_FILES['userfile']['type'] != "image/gif") {
     echo "Sorry, we only allow uploading GIF images";
     exit;
 }

 $uploaddir = 'uploads/';
 $uploadfile = $uploaddir . basename($_FILES['userfile']['name']);

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

 ?>