System: Win2000 SP3 (dual CPU if it matters), Apache 1.3.26 (default setup), and PHP 4.2.3 as a module (default setup)

Problem: When I use ob_start('callback') and "callback" takes $var as its parameter, Apache crashes if you modify $var and reassign it to $var.

Code:
<?php

ob_start('test');

echo 'This is a test!';

function test($output)
{
	$output = strtoupper($output);
	return $output;

	// Use this instead of the above and it works
	$test = strtoupper($output);
	return $test;
}

?>


It seems that an Apache child thread can process the script once before it crashes the child process. e.g. Refresh within KeepAliveTimeout seconds and it will crash; or with KeepAlive Off, it crashes after ThreadsPerChild requests.

The "Apache.exe has generated errors..." box pops up. The only thing in Apache's error log is

[info] master_main: Child processed exited prematurely. Restarting the child process.

I have the "Dr. Watson" crash log file that was generated if it's of any use: http://www.realplain.com/phpcrash.txt

BTW, that's weird; I just closed some apps that I usually have running so their processes wouldn't show up in that log and now I can't get the above script to crash every time (or at all!) like I could a few mins ago. Hmm... So don't know if you can reproduce it. However, the script where I originally noticed it is still crashing consistently as before.


Thanks for your time.