Joomla plugin & module develpment - Presented at Sydney JUG 09/04/2013
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This is an introduction to plugin and module extension development for Joomla 3. It was presented at Sydney JUG in April 2013, and was accompanied with some live demos of a simple content plugin and simple module. If you want the source code from the live demos, feel free to get in touch with me.
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Joomla plugin & module develpment - Presented at Sydney JUG 09/04/2013
- 1. Joomla Plugin & Module Develpment Tim Plummer http://twitter.com/bfsurvey Presented at Sydney JUG 09/04/2013
- 2. What is a plugin?
- 3. What is a module?
- 4. Tools you need • Web Server & PHP & MySQL (XAMPP) • Text editor or IDE (Textpad / Notepad++ or Eclipse / Netbeans) • Web browser (Firefox with firebug)
- 5. Getting started with plugins • Can be as simple as two files – yourplugin.xml – yourplugin.php • Located in /plugins/plugintype/yourplugin • Triggered by events
- 6. Installation XML (aka manifest) • yourplugin.xml file located in your plugin folder • Used when installing your plugin – tells Joomla all the files used, and the type of plugin it is. • Contains information about the plugin, such as it’s name, author, version number etc. • Has all the parameters (aka options)
- 7. Entry point • yourplugin.php file located in your plugin folder • This code is executed when the plugin runs, and can call other files. • Does all the hard work
- 8. Types of plugins • Authentication • Quick Icon • Captcha • Search • Content • Smart Search (finder) • Editors • User • Editors-XTD • System • Extension
- 9. Plugin Event Triggers • Authentication • Content – onUserAuthenticate – onContentAfterDelete – onUserAuthorisationFail – onContentAfterDisplay ure – onContentAfterSave • Captcha – onContentAfterTitle – onCheckAnswer – onContentBeforeDelete – onDisplay – onContentBeforeDisplay – onInit – onContentBeforeSave – onContentChangeState – onContentPrepare – onContentPrepareData – onContentPrepareForm – onContentSearch – onContentSearchAreas
- 10. Plugin Event Triggers…cont • Editors • Extension – onDisplay – onExtensionAfterInstall – onGetContent – onExtensionAfterSave – onGetInsertMethod – onExtensionAfterUninstall – onInit – onExtensionAfterUpdate – onSave – onExtensionBeforeInstall – onSetContent – onExtensionBeforeSave • Editors-XTD – onDisplay – onExtensionBeforeUninstall – onExtensionBeforeUpdate
- 11. Plugin Event Triggers…cont • Quick Icon • System – onGetIcons – onAfterDispatch • Search – onAfterInitialise – onAfterRender – onContentSearchAreas – onAfterRoute – onContentSearch • User • Smart Search – onUserAfterDelete – onFinderAfterDelete – onUserAfterSave – onFinderAfterSave – onUserBeforeDelete – onFinderBeforeSave – onUserBeforeSave – onFinderCategoryChangeState – onUserLogin – onFinderChangeState – onUserLogout
- 12. plg_content_joomlarocks • Hello World sucks, so instead tonight we are going to create a plugin called plg_content_joomlarocks • This plugin will find all the “Joomla!” text in articles and replace it with “Joomla Rocks” and turn this into a link that goes to www.joomla.org
- 13. Set Error Reporting to Maximum
- 14. Demo time…
- 15. Getting Started with modules • Slightly more complex than plugins, but still way simpler than components. • Can be as little as three files (but usually 4+) – mod_yourmodule.xml – mod_yourmodule.php – helper.php – /tmpl/default.php
- 16. Types of modules • Two types – Frontend Module (aka site) • /modules/yourmodule – Backend Module (aka administrator) • /administrator/modules/yourmodule
- 17. Installation XML (aka manifest) • mod_yourmodule.xml file located in your module folder • Used when installing your module – tells Joomla all the files used, and the type of module it is. • Contains information about the module, such as it’s name, author, version number etc. • Has all the parameters (aka options)
- 18. Entry Point • mod_yourmodule.php file located in your module folder • This code is executed when the plugin runs, and can call other files. • Is lazy and makes the helper and view do all the work.
- 19. Helper • helper.php file located in module folder • Talks to the database and prepares data for the view.
- 20. The View • Located in /tmpl/default.php in the module folder • Presents the data to the user • Doesn’t know where the data came from or how it is stored and doesn’t care (as Sargent Schultz would say, I know nothing!).
- 21. mod_random_article • Tonight we are going to create an article mod_random_article • This will randomly select an article and show the title with a link.
- 22. Demo time…
- 23. Now you are ready to start creating your own plugins and modules
- 24. Questions?
- 25. Tim Plummer @bfsurvey tim@tamlyncreative.com.au