Could you give me some advices to start coding joomla addons by using joomla framework?

I know php but I need to write a joomla addon by using joomla frame开发者_开发问答work. Could you give me some good advices to start ?

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You can start by reading the official documentation : Creating a simple module or if you're using Joomla 1.5 : Creating a Hello World Module for Joomla 1.5

You can browse the Developers Documentation for all topics related to Joomla development.