Hello I've been searching for a web hosting site that enables php frameworks, e.g. yii, cakephp, symfony, or are you forced to have an own server if you want that? Thanks in advance.
No you don't need to own the server, if you can upload a php file, most of the time it's ok. For example CakePHP Requierement page tell you :
HTTP Server. For example: Apache. mod_rewrite is preferred, but by no means required. PHP 4.3.2 or greater. Yes, CakePHP works great on PHP 4 and 5. Source : http://book.cakephp.org/view/28/Requirements
Yes , your server side should support PHP and the framework also A beginners guide to PHP Frameworks
You can run those frameworks on any web host that has PHP support. Just upload the framework files and your code and you're ready.
It depends on the framework you are willing to use.
With symfony, you'll need to have an access to the shell (command line). Check the specifications on the frameworks requirements
read framework documentation what php version it supports also.