What are the key differences between PHP usage in Joomla and other CMS platforms?

One key difference between PHP usage in Joomla and other CMS platforms is the structure and syntax of the code. Joomla uses its own framework and conventions for PHP development, which may require some adjustment for developers familiar with other CMS platforms. Additionally, Joomla has its own set of APIs and functions that are specific to the platform, which may not be directly transferable to other CMS platforms. Lastly, Joomla has a strong emphasis on security and performance, so developers need to adhere to Joomla's best practices when writing PHP code.

// Example PHP code snippet for Joomla
defined('_JEXEC') or die;

// Your Joomla-specific PHP code here