Actions and filters

Actions and filters are part of the WordPress hook system. Actions are events that occur during a request. We can use WordPress actions to execute certain functionalities after a specific event is completed. On the other hand, filters are functions that are used to filter, modify, and return data. Flexibility is one of the key reasons for the higher popularity of WordPress compared to other CMSs. WordPress has its own way of extending functionality of custom features as well as core features through actions and filters. These actions and filters allow developers to build advanced applications and plugins, which can be easily extended with minor code changes. As a WordPress developer, it's a must to know the perfect use of these actions and filters in order to build highly-flexible systems.