I'm trying t build a somekind a clone to wordpress and have some problems understanding the functions that are used there. But that's not the problem.. The thing I'm looking for is good book that detailed explains what aspects to be aware of during the creation of the cms and some code snippets or something in that direction..
With best regards
check this one out PHP 5 CMS Framework Development: Expert insight and practical guidance to creating an efficient, flexible, and robust framework for a PHP 5-based content management system
you may want to check the price at packtpub.com first they have 20% off Packt hard copies and 30% off Packt eBooks due to end Wednesday night.
I swear by this book from SitePoint:
http://www.sitepoint.com/books/phpmysql4/
A previous version of this book got me started programming several years back. The first site I built, with pieces of sample code still in use today, is powering a major sports website with thousands of articles. Since then I've done dozens of large, custom corporate CMS systems and I still fall back to the basic concepts this book taught.
No one book is going to be perfect, and there are many factors to consider when doing it...but this is a great basic start.
Good Luck.