Is there a PHP CMS that works the same way as the .NET CMS Umbraco?
Ie. All data output comes as XML and is transformed with xslt. And you as a developer have more or less total freedom to create any structure and output as you wish.
Reason for asking: Working primarily on OS X / Mac and I'm not very experienced with .NET and the Microsoft web dev. environment.
The XML/XSLT pipeline haven't really been that popular in the PHP world for two reasons: 1) It is perceived as heavyweight, compared to using PHP or some other similar template language and 2) Because of PHPs stateless nature, the performance isn't too good (Or at least hard to get right).
Have you looked at other technologies (eg Java) which run on a Mac? If so you could look at Alfresco? Otherwise you can run Umbraco in a Windows VM such as VirtualBox (free) or Fusion
Check out EZPublish.. i dont think it uses xml/xslt, but allows full control of content etc, like Umbraco does.
Umbraco really is very good and you don't need to know .net, that's the beauty, just some xslt. It is even developed on a mac platform (admittedly in Fusion).
But I understand you wanting to stick with your strengths, so try symphony cms http://symphony-cms.com/
Jay