PHP framework class - How to initiate classes via class

I usually setup a initial class on a website called something like baseFrame, which holds all the basics functions. (MVC style)

Now, I realized I was having issues calling the baseFrame from classes called throughout the website (the baseFrame has a function called callClass, which I was using to include and running the new class that extends from the base. I realized that you can't call a extended class under a function, because it's unable to read the parent class.

So, I wrote a new script called "callfunction.php" which was not a class base it self, it was a straight function that called the extended class, which calls the baseFrame correctly. Now this method worked, I however am not used to not using classes. Is there something I'm missing? Would I rather call a new class from within the baseFrame class? Is that possible? Again, running a class within the ba开发者_运维知识库seFrame class didn't allow me to call the extended at all...So I'm guessing that isn't technically possible?

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may be this resources help. there are many frameworks to build secure and reliable systems.

note: mvc is just one solution.

http://framework.zend.com/

http://wordpress.com (extensible via plugins)

http://www.codeigniter.com/