PHP File Upload Problems

Question

I wrote a Facebook app in PHP and need to be able to allow the user to upload an image to my server. I have used this code:

<?php
include_once('facebook.php');
$appapikey = 'API KEY HERE';
$appsecret = 'SECRET KEY HERE';
$facebook = new Facebook($appapikey, $appsecret);
$fb_user =  $facebook->require_login();

if((!empty($_FILES["uploaded_file"])) && ($_FILES['uploaded_file']['error'] == 0)) {
  $filename = basename($_FILES['uploaded_file']['name']);
  $ext = substr($filename, strrpos($filename, '.') + 1);
  if (($ext == "jpg") && ($_FILES["uploaded_file"]["type"] == "image/jpeg") && 
    ($_FILES["uploaded_file"]["size"] < 350000)) {
      $newname = dirname(__FILE__).'/upload/zbt_'.$fb_user.'.jpg';
      if ((move_uploaded_file($_FILES['uploaded_file']['tmp_name'],$newname))) {
         header("Location: http://majik.zbrowntechnology.info/display.php");
      } else {
         header("Location: home.php?Fatal");
      }
 } else {
     header("Location: home.php?Fatal");
  }
} else {
 header("Location: home.php?Fatal");
}
?>

but am not able to actually save the file in the directory. I have done some playing around with the code and think the problem lies in the moving of the file in this line:

if ((move_uploaded_file($_FILES['uploaded_file']['tmp_name'],$newname))) {....

Answer 1

It is not easy to do with FBML application.

First - you have to point your form to the script on your domain

<form enctype="multipart/form-data"
       action="http://your.domain/upload.php"
       method="post" >

Next: on that upload.php you have to handle the uploaded file, process it, do whatever you want and after that you need to redirect back to the your FBML canvas application at facebook.com.