Zend Framework has a disastrous cascading dependency issue. If you're only using one tiny piece, you're probably okay, but if you need something higher-level or

Zend Framework has a disastrous cascading dependency issue. If you're only using one tiny piece, you're probably okay, but if you need something higher-level or if you need a few components that work together, chances are you've just added a ton of files to your project, and that any backtrace you look at is going to be entirely useless. Symfony has required PHP 5.3 for a long time. Even in 1.4 many plugins required 5.3 and very often the trunk would break on 5.2 because a 5.3 feature squeeked in and had to be rolled back. Symfony is cutting edge, lean, and for people who want to get maximum productivity out of their time and their LoC. Zend Framework is for people who don't know better.