Description:
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Using a stock installation of PHP 5.2.6 (or 5.2.5 or 5.2.3) as an ISAPI module on Windows 2003 Standard Edition x32 (fully updated using Windows Update), if you pass a "wacky" value to strtotime the w3wp.exe (IIS Worker Pool) spikes to 99% and crashes the web server.

We accidentally used date("-24 hours") instead of strtotime("-24 hours") and then passed that (via some intermediary function calls) to strtotime.

It does not crash on Win2003 SE x64 (or any other operating system that we run this application on).

I am aware of other w3wp.exe bugs being reported but those do not seem to match this specific cause. Similarly, strtotime bugs don't seem to match.

Reproduce code:
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echo strtotime(date("-24 hours"));

Expected result:
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Return false or -1

(with the caveat that I know it's "bad code" on my part)

Actual result:
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w3wp.exe crashes as soon as the page starts to load.

Watching in task manager on the web server, you can see w3wp.exe spike to 99% then stay there. If you kill the task the web server behaves oddly, generating "Service Unavailable" results to the end browser until the "World Wide Web Publishing Service" is restarted.