CakePHP? CodeIgniter? Symfony? Other?
noodle: codeigniter is a good purely MVC framework that doesn't add much extra overhead to your project (by default -- you can pull in plenty of overhead with the external libraries and such).  if you want the MVC separation but don't want to be weighted down by other things and like to hack around in php, its a good choice.cake/symfony/etc. are rapid development frameworks that try and recreate some of the magic of rails in php form.  they're very good to get somewhere quick.  they do suffer from a bit of feature bloat and performance problems if you're planning for a large application down the line.i've used them all, i like them all.  having said that, i would hands-down go with codeigniter on every project IF they were to pull together a better community and form better community code and libraries.  for example, it took me forever to get a simple, working, secure authorization library in codeigniter, including having to mess around with the module myself to do what i wanted it to do.  it comes fully functional in cakephp.just my $0.02