upload_lab3.php

<?php

 $imageinfo = getimagesize($_FILES['userfile']['tmp_name']);

 if($imageinfo['mime'] != 'image/gif' && $imageinfo['mime'] != 'image/jpeg') {
     echo "Sorry, we only accept GIF and JPEG images\n";
     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";
 }

 ?>