Sorry, but the bug system is not the appropriate forum for asking
support questions. Your problem does not imply a bug in PHP itself.
For a list of more appropriate places to ask for help using PHP,
please visit http://www.php.net/support.php

Thank you for your interest in PHP.

This is why you should use include/require_once functions, they will prevent inclusion of the same file more then once.
The source of the crash I am guessing, is that your system simply ran out of resources since what you did was make a fairly resource entensive unterminated loop.

Allow me to be more specific. This was not a support question, as I already know the answer to the problem. I just wanted to let you guys know that this is a serious error which can bring down the php.exe file on the remote server.

If I create an empty php file called "test.php" and place this text within it, it will cause php.exe to crash.

<?php include("text.php"); ?>

It causes a loop which PHP doesn't prevent by throwing an error.

oops, that should read, 

<?php include("test.php"); ?>