what is a PHP Class?

I have never used php classes and object with it. All i know is writing functions and have always used simple php code.

Is there any good reason for me to use a php class?

 

yes to object oriented programing which is 100 times secure

 

This depends from your project. If you need simple script or simple website - so you can easy use only functions and be happy. If you want to develop really complex website, or use any PHP framework - you must learn Object Oriented Programming on PHP.

You can read detailed about classes here
http://www.php.net/manual/en/language.oop5.php

 

Classes are not more secure. It all depends on the way you write them. Same for normal code.

 

I heard that classes can be fast for complex code. Is it true?

 

making classes allows easy migration to other projects.

 

Yes. OOP allows you to more easily reuse and organize code. Learning classes expands your abilities as a coder.

Yes, but so can procedural coding; It just depends how you are doing it. The primary reason for OOP is to keep your code organized and reusable. Classes are useful when working on a project with multiple developers as well.

There is a lot you can do with classes, so I recommend learning them well, especially if you ever intend to use a framework.

 

To be very very simple. A class is a group of a load of functions. I learnt OOP a while back while writing a custom CMS. Well worth it.

 

All of the big CMS systems and stuff you'll see around the net are OOP and built around classes.. These forums (vBulletin) being a perfect example..