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. Suhosin comes in two independent parts, that can be used separately or in combination. The first part is a small patch against the PHP core, that implements a few low-level protections against bufferoverflows or format string vulnerabilities and the second part is a powerful PHP extension that implements all the other protections.
If you are using PHP only for your own server and only for your own scripts and applications, then you can judge for yourself, if you trust your code enough. In that case you most probably don’t need the Suhosin extension. Because most of it’s features are meant to protect servers against vulnerable programming techniques. However PHP is a very complex programming language with a lot of pitfalls that are often overseen during the development of applications. Even PHP core programmers are writing insecure code from time to time, because they did not know about a PHP pitfall. Therefore it is always a good idea to have Suhosin as your safety net.
P.S. Suhosin (수호신) is a south-korean word that means something very similiar to the english guardian-angel.
License: PHP License 3.01