Apache crashes every other time PHP script is ran...Windows

Question

XAMPP installation (Apache, MySQL, PHP, Perl) is crashing every other time I call a DOTNET object through PHP. For instance the sample code on php.net

<?php
  $stack = new DOTNET("mscorlib", "System.Collections.Stack");
  $stack->Push(".Net");
  $stack->Push("Hello ");
  echo $stack->Pop() . $stack->Pop();
  //$stack = NULL; tried this, with no luck
?>

This will display Hello .Net the first time, but if I refresh the page Apache crashes and immediately restarts. If I refresh again, I see Hello .Net. If I refresh again, you guessed it; Apache crashes....any ideas? Maybe I should be releasing the object somehow?

Thanks

Apache Log:

[Wed Feb 29 00:59:44 2012] [notice] Apache/2.2.21 (Win32) SVN/1.6.6 DAV/2 mod_ssl/2.2.21 OpenSSL/1.0.0e PHP/5.3.8 mod_perl/2.0.4 Perl/v5.10.1 configured -- resuming normal operations
[Wed Feb 29 00:59:44 2012] [notice] Server built: Sep 10 2011 11:34:11
[Wed Feb 29 00:59:44 2012] [notice] Parent: Created child process 5156
[Wed Feb 29 00:59:45 2012] [notice] Digest: generating secret for digest authentication ...
[Wed Feb 29 00:59:45 2012] [notice] Digest: done
[Wed Feb 29 00:59:46 2012] [notice] Child 5156: Child process is running
[Wed Feb 29 00:59:46 2012] [notice] Child 5156: Acquired the start mutex.
[Wed Feb 29 00:59:46 2012] [notice] Child 5156: Starting 150 worker threads.
[Wed Feb 29 00:59:46 2012] [notice] Child 5156: Starting thread to listen on port 443.
[Wed Feb 29 00:59:46 2012] [notice] Child 5156: Starting thread to listen on port 443.
[Wed Feb 29 00:59:46 2012] [notice] Child 5156: Starting thread to listen on port 80.
[Wed Feb 29 00:59:46 2012] [notice] Child 5156: Starting thread to listen on port 80.
[Wed Feb 29 00:59:49 2012] [notice] Parent: child process exited with status 3221225477 -- Restarting.
[Wed Feb 29 00:59:50 2012] [notice] Digest: generating secret for digest authentication ...
[Wed Feb 29 00:59:50 2012] [notice] Digest: done
[Wed Feb 29 00:59:51 2012] [notice] Apache/2.2.21 (Win32) SVN/1.6.6 DAV/2 mod_ssl/2.2.21 OpenSSL/1.0.0e PHP/5.3.8 mod_perl/2.0.4 Perl/v5.10.1 configured -- resuming normal operations
[Wed Feb 29 00:59:51 2012] [notice] Server built: Sep 10 2011 11:34:11
[Wed Feb 29 00:59:51 2012] [notice] Parent: Created child process 5948
[Wed Feb 29 00:59:51 2012] [notice] Digest: generating secret for digest authentication ...
[Wed Feb 29 00:59:51 2012] [notice] Digest: done
[Wed Feb 29 00:59:52 2012] [notice] Child 5948: Child process is running
[Wed Feb 29 00:59:52 2012] [notice] Child 5948: Acquired the start mutex.
[Wed Feb 29 00:59:52 2012] [notice] Child 5948: Starting 150 worker threads.
[Wed Feb 29 00:59:52 2012] [notice] Child 5948: Starting thread to listen on port 443.
[Wed Feb 29 00:59:52 2012] [notice] Child 5948: Starting thread to listen on port 80.
[Wed Feb 29 00:59:52 2012] [notice] Child 5948: Starting thread to listen on port 80.
[Wed Feb 29 00:59:52 2012] [notice] Child 5948: Starting thread to listen on port 443.
[Wed Feb 29 00:59:55 2012] [notice] Parent: child process exited with status 3221225477 -- Restarting.
[Wed Feb 29 00:59:55 2012] [notice] Digest: generating secret for digest authentication ...
[Wed Feb 29 00:59:55 2012] [notice] Digest: done
[Wed Feb 29 00:59:57 2012] [notice] Apache/2.2.21 (Win32) SVN/1.6.6 DAV/2 mod_ssl/2.2.21 OpenSSL/1.0.0e PHP/5.3.8 mod_perl/2.0.4 Perl/v5.10.1 configured -- resuming normal operations
[Wed Feb 29 00:59:57 2012] [notice] Server built: Sep 10 2011 11:34:11
[Wed Feb 29 00:59:57 2012] [notice] Parent: Created child process 4596
[Wed Feb 29 00:59:58 2012] [notice] Digest: generating secret for digest authentication ...
[Wed Feb 29 00:59:58 2012] [notice] Digest: done
[Wed Feb 29 00:59:59 2012] [notice] Child 4596: Child process is running
[Wed Feb 29 00:59:59 2012] [notice] Child 4596: Acquired the start mutex.
[Wed Feb 29 00:59:59 2012] [notice] Child 4596: Starting 150 worker threads.
[Wed Feb 29 00:59:59 2012] [notice] Child 4596: Starting thread to listen on port 443.
[Wed Feb 29 00:59:59 2012] [notice] Child 4596: Starting thread to listen on port 80.
[Wed Feb 29 00:59:59 2012] [notice] Child 4596: Starting thread to listen on port 443.
[Wed Feb 29 00:59:59 2012] [notice] Child 4596: Starting thread to listen on port 80.

This shows a few reboots.

Answer 1

file could be

$stack = new DOTNET("mscorlib", "System.Collections.Stack");
$stack->Push(".Net");

create a file with your commands, instead of calling directly use below call

$output = exec("php dotnet.php"); 

echo $output;