WordPress Hooks: Actions, Filters

Hooks in WordPress allow developers to easily tie their own code in with the WordPress core code base, themes, and plugins. In this article, we’ll discover what hooks are, go over the different types of hooks

A Hook is a generic term in WordPress that refers to places where you can add your own code or change what WordPress is doing or outputting by default. Two types of hooks exist in WordPress: actions and filters.

Action Hook  

An Action in WordPress is a hook that is triggered at specific time when WordPress is running and lets you take an action. This can include things like creating a widget when WordPress is initializing or sending a Tweet when someone publishes a post.

 Action Hook  Reference page has available actions listed by the following categories:

·  Actions Run During a Typical Request

·  Actions Run During an Admin Page Request

·  Post, Page, Attachment, and Category Actions (Admin)

·  Comment, Ping, and Trackback Actions

·  Blogroll Actions

·  Feed Actions

·  Template Actions

·  Administrative Actions

·  Dashboard “Right Now” Widget Actions  

Filter Hook  

A Filter in WordPress allows you get and modify WordPress data before it is sent to the database or the browser. Some examples of filters would include customizing how excerpts are displayed or adding some custom code to the end of a blog post. 

 Filter Hook  Reference page, which it lists by the following categories:

·  Actions Run During an Admin Page Request

·  Post, Page, Attachment, and Category Actions (Admin)

·  Comment, Ping, and Trackback Actions

·  Blogroll Actions

·  Feed Actions

·  Template Actions

·  Administrative Actions

·  Dashboard “Right Now” Widget Actions

·  Post, Page, and Attachment (Upload) Filters

·  Comment, Trackback, and Ping Filters

·  Category and Term Filters

·  Link Filters

·  Date and Time Filters

·  Author and User Filters

·  Blogroll Filters

·  Blog Information and Option Filters

·  General Text Filters

·  Administrative Filters

·  Rich Text Editor Filters

·  Template Filters

·  Registration & Login Filters

·  Redirect/Rewrite Filters

·  WP_Query Filters

·  Media Filters

·  Advanced WordPress Filters

·  Widgets

·  Admin Bar