Doug Brown asks a question on his blog today that is coming up more and more, especially on those programmers new to the language that don't quite get what frameworks really have to offer. Do you really need a framework for writing PHP?
The simplicity in using PHP sometimes acts against it. Since there are very few coding restrictions, developers tend to write a bad code. The answer to this is definitely to use a framework. There are various PHP Frameworks available today like Zend Framework, CakePHP Framework and CodeIgniter. They provide a strong organization for your application and follow the commonly used MVC pattern.
To help out those new to frameworks, offers a few things they have to offer that normal procedural/library-based development may not. These include maintaining code standards, attractive URLs and getting help when you need it from other developers using the same system.