PHP Curl File Upload Multipart Boundary - php

Question

Writing an application that proxies a file upload. I'm using CURL to post the file but having a few problems. Posting to the script is ok, its posting from the script to the next server which is the problem. I keep getting this error from the server:
"the request was rejected because no multipart boundary was found"
here is my code:
$post = $_POST;
// allow for file upload proxying
if( !empty( $_FILES ) ){
// add to post data
foreach( $_FILES as $name => $upload ){
$post[ $name ] = '#' . $upload[ 'tmp_name' ] . ';type=image/png';
}
}
// init curl
$ch = curl_init( $url );
// configure options
curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
curl_setopt( $ch, CURLOPT_FOLLOWLOCATION, true );
// post data
if( !empty( $post ) ){
curl_setopt( $ch, CURLOPT_POST, true );
curl_setopt( $ch, CURLOPT_POSTFIELDS, $post );
// for file uploads, multi-part
curl_setopt( $ch, CURLOPT_HTTPHEADER, array(
'Content-type: multipart/form-data;'
) );
}
// execute and get return value
$return = trim( curl_exec( $ch ) );
// cleanup
curl_close( $ch );
unset( $ch );
Everything I've read online suggests that this should work and also that setting the header content type is unnecessary, but when I remove the content type I get this error:
"the request doesn't contain a multipart/form-data or multipart/mixed stream, content type header is null"
any ideas? thanks in advance

Answer 1

Not sure exactly what the problem was, but I was working locally when I posted this. Moved the code onto a live server and the problem disappeared...