Excited by the the PERL module XML::DifferenceMarkup I've decided to make the same possible in PHP. The new extension xmldiff recently arrived at PECL. It utilizes the libbdiffmark, the library behind XML::DifferenceMarkup. The xmldiff extension can operate on local XML files, strings in memory or DOMDocument objects.
I've just wrote a wrapper extension to the TA-Lib - the technical analysis library. It includes over 150 market analysis indicators and some of vector math functions. The ext is primarily intended to help finance software developers to analyse market data with PHP. Nevertheless I think it wouldn't help to forecast the recently blowed Facebooks IPO
There is a new PHP extension I've written to work with Varnish. The extension allows interaction from within a PHP script with a running Varnish instance. For now there is a basic useful functionality such as ban URLs or set/get Varnish configuration. There will be more with the time. For now I would give a couple of examples for the extension usage, as there is not really any docs for the extension here.
last week I wrote a PHP port for Joerg Michael's gender program. The program stands for gender recognition based on firstnames and has a base of >40000 firstnames from around the world. I hope the stuff is deserved to be accepted on PECL.