"Don't compare PHP with Zope. PHP is a tiny language compared to the fat Zope frameworks. Working with Zope on the scripter level (ZPT, DTMl, ZSQL) requires similar skills as a PHP programmer. If you want to go beyond you have approach open-minded and come a with some solid knowledge in programming and understanding architectural issues in Zope. But when I read some questions here then I have the impression that people except that Zope solves their problems although neither they don't understand the problems themselves nor have the basic skills to reach the goal."
This is very good because it reminds us that one little part of Zope is what the whole of PHP offers more or less. I like PHP and it's open source community momentum but technically it is very basic compared to Zope.
As Andreas points out, it's not until you want to go beyond scripting that you have to take a step back and accept that Zope has a learning curve.