Output Buffering/Register Shutdown Function

Hi, Im using PHP 4.4 in a CMS. I have an ob_start() and a function

function endBuffer(){
		
		$buffer = ob_get_contents();
		ob_end_clean();
		
		$buffer = displayBuffer($buffer);
		
		echo $buffer;
		
}

PHP:

Initially I was just doing ob_start('displayBuffer'); but i learnt i cant use output buffers in the ob_start callback (displayBuffer).

So, I put everything in endBuffer and tried to call that using register_shutdown_function(endBuffer) but it looks like, on shutdown, the buffer is already flushed?

How can I set this up so that the endBuffer function gets called at the end of the script, but before it automatically gets flushed?

 

maby by putting it at the end? but why do you want to save all printed data?

 

Its for a CMS.

And I want to avoid having to manually put it at the end.

 

I don't think there is an option to do so, just put something at the end

 

so theres no other php callbacks that get triggered before the shutdown functions?