Image upload broken since server change to php 5.6 - php

Question

This code was working well until my server upgrade to PHP 5.6.
<?php
if (isset($GLOBALS["HTTP_RAW_POST_DATA"])) {
$imageData = $GLOBALS['HTTP_RAW_POST_DATA'];
$filteredData = substr($imageData, strpos($imageData, ",")+1);
$unencodedData = base64_decode($filteredData);
$fn = (isset($_SERVER['HTTP_X_FILENAME']) ? $_SERVER['HTTP_X_FILENAME'] : false);
$fp = fopen('upload/' . $fn, 'w');
fwrite($fp, $unencodedData);
fclose($fp);
}
I'm a noob at PHP, tweaking open-source code when I need it.

Answer 1

Yep "HTTP_RAW_POST_DATA" was the culprit. As well as setRequestHeader no longer accepting underscores.
In answer to your question junkfoodjunkie it's for this http://www.screentoys.com
I built it as a learning project a few years ago but the 'load your own photo and save it' feature had stopped working, hence my post. I hadn't touched it for a fair while and so only noticed recently.
After some experimentation here's the fix:
$img = file_get_contents("php://input");
$img = str_replace('data:image/jpeg;base64,', '', $img);
$img = str_replace(' ', '+', $img);
$data = base64_decode($img);
$fn = (isset($_SERVER['HTTP_X_FILENAME']) ? $_SERVER['HTTP_X_FILENAME'] : false);
file_put_contents('upload/'.$fn, $data);
Had to change:
xhr.setRequestHeader("X_FILENAME", dropOneName);
to:
xhr.setRequestHeader("X-FILENAME", dropOneName);
in the JS as well.
It saves a drag 'n dropped canvas image to the server.