Advance Component Development by Azrul Rahim
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The document provides an overview of Joomla development, specifically focusing on the MVC architecture introduced in Joomla! 1.5. It outlines the roles of models, views, and controllers, as well as essential utilities and best practices for error handling and internationalization. Key concepts include the use of Joomla's API and the importance of separating application control and presentation logic.
Advance Component Development by Azrul Rahim
- 1. Azrul Rahim
- 2. Developer of JomComment & MyBlog JomSocial ( www.jomsocial.com ) 3 years of Joomla! coding experience Started with Joomla! 1.0 and now code exclusively for Joomla! 1.5 Slides co-written by Toby Patterson
- 3. Introduction to Joomla MVC Business logic in Joomla Examples Some useful utilities and libraries JFactory, JRequest, and others Introduction to some advance topics Error handling Internationalization
- 4. All component is stored in /components/ folder component/com_hello/ hello.php
- 5. JOOMLA 1.0 JOOMLA 1.5
- 7. Model – manage data and logic. All database calls should be here View – render the data from model. No business logic here please Controller – control application flow Interpret user request Trigger appropriate model Pass model to view
- 9. Minimal code here. Execute the controller
- 10. Process user request DO NOT Do db calls Echo anything! Pass the execution to view
- 11. Extends JModel Your method represent business logic
- 12. Render the output Grab data from model Have direct access to the default model
- 13. Layout file does the final HTML output default.php nogreetings.php
- 14. Separate application control, data logic and view The important concepts to take away are: Controllers represent control logic; Models represent business/data logic; Views represent presentation logic; Layouts are for markup language.
- 15. More on Joomla! API
- 16. MVC – JController, JModel , JView JRequest – grab user POST/GET/REQUEST data JText multi-language support Use JText::_ ( ) and JText::sprintf( ) JFactory - access global objects JUser – User object
- 17. Implement “Factory” design pattern ::getApplication() (instead of global $mainframe) ::getDBO(); ::getDocument();
- 18. Don’t just use JRequest::getVar( ….) ::getWord(…) ::getCmd(…) ::getString(…) ::getBool(…) ::getFloat(…) ::getInt(…)
- 19. A string is series of characters. In PHP, a character is the same as a byte , that is, there are exactly 256 different characters possible. This also implies that PHP has no native support of Unicode. From php.net, definition of a string
- 20. Ensure UTF-8 integrity Use JString:: functions JString::strlen(…) Support internationalization JText::_(…) JText::sprintf(…)
- 21. DO NOT use fopen, fread … Use Joomla calls JFolder JFile JPath
- 22. Display warning message $mainframe = JFactory::getApplication(); $mainframe->enqueuMessage(‘Warning’);
- 23. We want to fail fast! Do not let error propagate to other part of the code