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Date: Fri, 09 Feb 2007 13:40:36 -0500
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Subject: PHP 5.2.1 crashing Apache/IIS...
From: thruska@cubiclesoft.com (Thomas Hruska)

Heads up!  Installed the latest Win32 binaries of thread-safe PHP 5.2.1 
on Win32 Apache and IIS.  PHP started crashing (definitely PHP - 
php5ts.dll) when I went to access the MyProBB web forum.  (Win32 Apache 
flat out crashes, IIS bails with HTTP 500 errors).

Forum crashes PHP 5.2.1:
http://www.cubiclesoft.com/Forum/

Source to the forum software is here:
http://www.cubiclesoft.com/MyProBB/

Worked fine under 5.2.0.  I only depend on PHP for the forum.
A straight-up phpinfo(); page seems to work fine.
I upgraded by killing each webserver instance, copying the files from 
the ZIP file over the existing PHP directories and files, and restarting 
the server.

So I then took the hard route of deleting the PHP directory and dumping 
the binaries into it from scratch and putting together a working php.ini 
file again...crash.

So I tried to narrow down the problem and it appeared to be crashing in 
a VERY bizarre location:

   $Data = str_ireplace("\n", "<br>", $Data);

So, I created a test script and eventually narrowed it down to:

<?
   $Data = "Change tracking and management software designed to watch 
for abnormal system behavior.\nSuggest features, report bugs, or ask 
questions here.";
   $Data = str_ireplace("\r\n", "<br>", $Data);
   $Data = str_ireplace("\n", "<br>", $Data);
   $Data = str_ireplace("\r\n", "<br>", $Data);
   $Data = str_ireplace("\n", "<br>", $Data);
   $Data = str_ireplace("\r\n", "<br>", $Data);
   $Data = str_ireplace("\n", "<br>", $Data);
   $Data = str_ireplace("\r\n", "<br>", $Data);
   $Data = str_ireplace("\n", "<br>", $Data);
   $Data = str_ireplace("\r\n", "<br>", $Data);
   $Data = str_ireplace("\n", "<br>", $Data);
   $Data = str_ireplace("\r\n", "<br>", $Data);
   $Data = str_ireplace("\n", "<br>", $Data);
   $Data = str_ireplace("\r\n", "<br>", $Data);
   $Data = str_ireplace("\n", "<br>", $Data);
?>

This script crashes PHP 5.2.1 everywhere.  Command-line and web server 
(module and CGI modes).  IMO, there's a bug somewhere in str_ireplace(). 
  But it could be also more fundamental with how Zend treats variables. 
  All that showing data around assigning a variable to itself.

-- 
Thomas Hruska
CubicleSoft President
Ph: 517-803-4197

http://www.CubicleSoft.com/