Suhosin is a security patch/extension for PHP.
Suhosin is an advanced protection system for PHP installations. It was designed to protect servers and users from known and unknown flaws in PHP applications and the PHP core.
Here is a recent SecurityFocus talk/article with the author of this package, that goes into the details of the project and what is ahead…
PHP Security From The Inside
While this patch [or extension] is simple to setup under Linux, the Windows side is a bit more difficult: as no binaries are provided, which necessitates a build of PHP w/extension from source…
And anyone thats ever tried to build win32 PHP knows what a headache that can be. What PHP.net provides in source is about 20% of whats needed, and contains extension libs that are from year 2000.
_Though I will say_ that some extensions/dlls CAN be built, that do not depend on anything else.