Joomla,extension

Hey, anybody help me or suggest me.I want to learn build up or customize joomla extension.At first what can I learn? please tell me..

 

You can start with Joomla documentation for developer: http://docs.joomla.org/Category:Component_Development

 

This is a good book to get you started Joomla! Programming (Joomla! Press) , I am using it myself.

 

I think you should go these books
"Joomla Explained" by Stephen Burge
[FONT=Verdana, sans-serif]"The Official Joomla" by Jennifer Marriott
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web-designs-company.com

 

Does anyone know where is the best source of extensions for joomla then?

 

you can get more information about joomla go to http://www.bigrock.in/web-hosting/cms-hosting.php

 

First learn PHP well then go through http://docs.joomla.org/Category%3aComponent_Development Next take a simple extension and see how it is built. Customize/change and test it. This way you will become an expert soon.

 

As there are many Joomla sites using older versions, this is a also a great resource explaining how to build components that work on multiple versions:
http://docs.joomla.org/Making_single_installation_packages_for_Joomla!_1.5,_1.6_and_1.7