I have installed File Upload add on to the miniBB and it works fine. When I try to attach file types and sizes that not allowed, the system correctly raises error message saying "Files were not upload...etc", but unfortunately the background content for this message is the "raw header file".

I am including the miniBB forum using the following code. The reason most likely is that Javascript pops up the message before the whole page loads on the background, but what is the fix? Any ideas to create the error message after loading the forum? Have tried include the header on the buffer before the "forum_root.php" without any luck.

<?php
ob_start();
// include ('header.php');
include ('forum_root.php');
$flushed=ob_get_contents();
ob_end_clean();

/* Output your header here */
include 'header.php';

echo $flushed;

/* Output your footer here */
include $_SERVER['DOCUMENT_ROOT'].'/common/footer.php';
?>

First of all, it's not very clear why should you use the ob_start and the other approaches of code you are using. I'm mostly sure miniBB could be embedded using its own default methods (for example, for the footer part I clearly see it could be done using $includeFooter definition of miniBB settings).

Second, whatever I could say at the moment, is that miniBB pops up the JS alert after uploading the "wrong" file, and this happens in the code of bb_plugins2.php part. You may study it and disable or modify this code.

Thank you - will try to debug.

I used ob-start because it was recommended in the manual. The below is an extract of the example from the Manual

<?php

ob_start();

include ('./index.php');

$flushed=ob_get_contents();
ob_end_clean();

/* Output your header here */
echo 'header';

echo $flushed;

/* Output your footer here */
echo 'footer';

?>

In the Manual, there is provided an example for basic miniBB version only, and it's a very rough and simple example.

Honestly speaking, I didn't test it with File Uploads add-on and regarding its errors coming up, so depending on the code you may have in your own header/footer file, they may have a different behavior regarding this code. Right now I couldn't debug it with the code provided, but I could try in a few days and then come up with more detailed report.