PHP library for LRDD+XRD

[Will Norris <will@willnorris.com>]

I've been working on a common PHP discovery library which can be used  
by the existing OAuth/OpenID/etc libraries.  So far, I've been  
focusing on XRDS and Yadis, but decided to try a branch that  
exclusively works with XRD and LRDD.  It still needs a bit of work and  
documentation, but for the most part is completely functional.  There  
are unit tests for most everything that should give you and idea how  
it works.  Realistically, the only way most users would make use of  
the library would be:

// if needing XRD...
// $xrd is an XRD object
$xrd = XRD::discover('http://example.com');


// if using LRDD directly... (will probably make this a static call  
like XRD above)
// $links is an array of LRDD_Link objects
$lrdd = LRDD();
$links = $lrdd->discover('http://example.com');

Code is in github: http://github.com/willnorris/php-xrd/tree/XRD

I bought openxrd.org a while back in order to reserve the namespace  
for libraries, so I've set it up with a very simple XRD file, and the  
three different LRDD links.  Some of the unit tests in the library are  
using that site to test remote fetching.

-will