(need your recommendation) Which PHP Framework for professional web applications ?

I have never used any but Codeigniter is the most famous. Also consider Cakephp.
But never jump to a framework directly, only use frameworks once you are quite comfortable with the language itself.

Some PHP frameworks you can consider are Yii, CodeIgniter and CakePHP. CodeIgniter uses MVC (Model View Controller); CakePHP is very similar to CodeIgniter and is well documented.

Codeigniter seem to be interesting, but how about integrating chart libraries, from my readings it doesn't seem to be easy at all while the main concept of these frameworks is to use functions in controllers to load view pages !!!

tough question.
it depends on your application.
Personally when trying to save time I opt for an existing CMS for standard sites. But if I am creating some pretty neat functionality (web app) then I might use a framework.
I would choose a framework that handles my specific web apps needs, and has documentation about that particular feature.
BUT... if I already have a developer, I would go with whatever that developer is most comfortable with. They will be much faster at using something that they are familiar with, and much slower if they have to learn a new framework.

Normally the developers that you choose will be familiar with the most common frameworks (like codeignitor) for good reason. Namely that these frameworks do indeed save time.

What is it that you want to accomplish?
You get a lot for free if you just make a WordPress site and a plugin.

Personally I like my own framework, thats what I use for my more complex WordPress plugins like WP Affiliate Shop. I use the framework and WordPress to setup my own APIs etc also.

The application makes a lot of calculations using database entries, And generates charts, does Wordpress handle all that ??

Zend Framework and symfony are two very popular choices.

However, I can tell you from my own experience that your first few projects with a framework won't be completed much faster.

As the others have already mentioned, you still need to develop most of the functionality yourself. Frameworks only help you with things like form validation, database entries etc. Zend Framework also has lots of little helpers like PDF creation and some great support for the Dojo AJAX Framework.

PHP frameworks have a pretty steep learning curve. If you need to get something done really quick, don't use them. If you have some time to learn something new along the way, go ahead.

Thanks a lot for your posts, I will just give Codeigniter a shot and see how I'll perform with it.

Vielen Dank.

I've used Kohana in the past:

Kohana: The Swift PHP Framework

Highly recommend it

Another thing that i realy like on scriptcase is that it is the only framework that is not database driven it is application oriented. It is realy different from all others.

You might consider creating your own.

I would suggest you cakePHP. It is simple and uses commonly known design patterns like ActiveRecord, Association Data Mapping, Front Controller and MVC. But before using any PHP framework it is better to get clear about the programming language itself.

I will not recommend Cake Php - very difficult to customzie. The best is Symfony and also Code Igniter.

I would suggest for two things regarding the framework. Firstly the MVC pattern, which is easy and the best one to use, and if there is still any confusion then secondly the search engine.

if you like simple code, you can try codeigniter. it is verry simple,

Normally the developers that you choose will be familiar with the most common frameworks like codeignitor for good reason. Namely that these frameworks do indeed save time.

Zend framework is the best framework for PHP. Using it from years.