XML Canonicaliztion functions C14N() and C14NFile() have been added to DOM for PHP 5.2. Until this is released, I wrote some functionality to perform basic exclusive canonical XML (So far it has worked fine with all the Soap services implemeting WSSE I have encountered as well as XML using XMLDSIG). When used within a system running PHP 5.2 it will use the functionality built into the DOM extension rather than the custom implementation.

Its great to see he is taking the time to port functionality back to PHP 5.1.x in userland, and yet, when the functionatility is available through the XML extension it is used instead. Great job.