FTP upload file to distant server with CURL and PHP uploads a blank file

After 2 days of banging my head against the keyboard.. finally i did it..
Here is how:

<?php

    if (isset($_POST['Submit'])) {
 if (!empty($_FILES['upload']['name'])) {
    $ch = curl_init();
    $localfile = $_FILES['upload']['tmp_name'];
    $fp = fopen($localfile, 'r');
    curl_setopt($ch, CURLOPT_URL, 'ftp://domain.com/'.$_FILES['upload']['name']);
    curl_setopt($ch, CURLOPT_USERPWD, "user:pass");
    curl_setopt($ch, CURLOPT_UPLOAD, 1);
    curl_setopt($ch, CURLOPT_INFILE, $fp);
    curl_setopt($ch, CURLOPT_INFILESIZE, filesize($localfile));
    curl_exec ($ch);
    $error_no = curl_errno($ch);
    curl_close ($ch);
        if ($error_no == 0) {
            $error="File uploaded succesfully.";
        } else {
            $error="File upload error.";
        }
 } else {
        $error="Please select a file.";
 }
}
  echo $error;  
?> 

Here is the source, from where i found the solution