
There are many PHP frameworks available for developers to choose from when creating a project. Frameworks such as CodeIgniter, CakePHP, Symfony and Zend are the most popular frameworks used by developers.
In this article I will compile a list of 5 frameworks that many developers may not know of.
Seagull

Supports:
- PHP4
- PHP5
- Multiple Database's
- ORM
- DB Objects
- Templates
- Caching
- Validation
- Ajax
- Auth Module
- Modules
PHP on TRAX

Supports:
- PHP5
- Multiple Database's
- ORM
- DB Objects
- Validation
- Ajax
- Modules
Yii

Supports:
- PHP5
- Multiple Database's
- ORM
- DB Objects
- Templates
- Caching
- Validation
- Ajax
- Auth Module
- Modules
Akelos

Supports:
- PHP4
- PHP5
- Multiple Database's
- ORM
- DB Objects
- Templates
- Caching
- Validation
- Ajax
- Auth Module
- Modules
Prado

Supports:
- PHP5
- Multiple Database's
- ORM
- DB Objects
- Templates
- Caching
- Validation
- Ajax
- Auth Module
- Modules
Other frameworks
If there are other frameworks that you know of that you think I have missed then please feel free to post a comment.
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I've recently started a project with Yii, and I've gotta say, I'm thoroughly impressed. I just wish that the scaffolding included building database tables and everything, like Ruby on Rails does. I haven't really come across any PHP frameworks that go that extra step, but it really does help reduce some of the work involved in building a skeleton app w/ scaffolding.
Have you checked out CakePHP? The developers tried to make it as much like Ruby on Rails as they could for PHP. It also allows for scaffolding.
I wonder why you have not added the Lithium PHP 5.3 framework . Its the latest from those who were in the cake PHP project . Also what about Kohana ? Solar ?
Lithium may be the one that's already there to support PHP 5.3 and I don't love going back to PHP4 . So is there any necessity to show that ?