May be the question is so simple for you. But many times I feel it is much complicated. Everyone would have started their website with a custom cms and later moved to Wordpress, Drupal, Joomla or something similar.
I used to look for a better book or blog posts which has design decisions made for the cms to make it such a way that it can be extended. Some of the books that seems interesting to me are
It will be great to see if you have came across such books or do you recommend any other books. I am not just looking for PHP, but I am interested to read any sort of books, which will help me to build the next blogger.
Things that make me interested are
and similar stuffs.
Thank you