The WordPress Hooks system is what makes WordPress so extendable, and allows you to build anything on the foundation of WordPress, from a blog to an online eCommerce platform. In this lesson, you will learn about filter hooks, how they work, how to choose the right hook, and how to use them in your code.

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Jonathan Bossenger
WordPress Filter Hooks
Learn.WordPress.org

2. What you will learn
What are hooks?
The two types of hooks, actions and filters?
How to use filters.
Filter hook priority.
Filter hook arguments.
Filter hook order.

3. What are hooks?
Hooks allow your theme or plugin code to interact with or modify the
execution of a WordPress request at specific, predefined spots.

4. Two types of hooks
1 Action hooks (or actions) allow you to perform an action at a
specific point in the request execution.
2 Filter hooks (or filters) allow you to modify (or filter) some data
at a specific point in the request execution.

5. Filter hooks
Filters allow you to modify, or filter, some data at a specific point, which will
be used later on.
https://developer.wordpress.org/plugins/hooks/filters/

6. Hook Order
WordPress Filter Reference
https://codex.wordpress.org/Plugin_API/Filter_Reference

7. Confidential Customized for Lorem Ipsum LLC Version 1.0
WordPress Filter Hooks
Learn.WordPress.org