a MongoDB administration tool, written in PHP5, is Best in PHP world, more like PHPMyAdmin.
a consistent hashing algo for memcache clients
The Computer Language Benchmarks Game is a collection of 429 programs, consisting of 13 benchmark reimplemented across 33 programming languages. It is a fantastic resource if you are trying to compare programming languages quantitatively. Which, oddly, very few people seems to be interested in doing.
old bug but still threre: looks like php code can take over any file descriptors, including apache's listening socket
I dislike PHP. It's because it's users. The lecturer tells about xss among others and guess what his site suffers from? sigh.