Joomla! Documentation™

Under Construction!

This page contains an index to the set of Joomla API Guides. These guides aim to help you understand how to use these Joomla functions in your own Joomla extensions.

Each API guide includes sample code which you can copy and install in your own development environment. Generally these code samples are written to be included and installed as Joomla module, so if you're not familiar with Joomla module development you may find going through the short series Creating a Simple Module useful.

Around Joomla 3.8 the Joomla development team began changing the naming convention of Joomla classes to use namespaces, so that for example JFactory changed to Factory in the Joomla\CMS namespace. As you read existing Joomla code and documentation you may find the classes following either the new or the old naming standard. You can find the mapping between the two naming conventions in the libraries/classmap.php file in your Joomla instance.

• Database / JDatabase. There are two API guides, covering Selecting data using JDatabase and Inserting, Updating and Removing data using JDatabase
• Input / JInput Using the Input class to obtain the values of parameters in HTTP GET and POST requests
• Log / JLog Log messages (eg error messages, debug messages) to a log file, and optionally to the debug console