Sandro Groganz has a quick note posted on his blog about the online availability of the text of his article "PHP 5 Enterprise Edition".

I just found that my article entitled "PHP 5 Enterprise Edition" is now available online. It has initially been published in the International PHP Magazine.

He quotes a bit from the introduction to give you an idea of what the article's about, but defers the rest of the article to the International PHP Magazine website. There's lots of good content, screenshots, layouts and plenty of related links as well.