Removing hooks in Wordpress - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a hook in WordPress?

A hook is a way to add or change functionality in WordPress without editing core files. It lets you run your code at specific points.

beginner

How do you remove an action hook in WordPress?

Use the function remove_action('hook_name', 'function_name', priority) to stop a function from running on that hook.

intermediate

Why do you need to specify the priority when removing a hook?

Because WordPress uses priority to know which function to remove. If you don’t match the priority used when adding, the hook won’t be removed.

intermediate

Can you remove a hook added by a plugin or theme?

Yes, but only if you know the exact function name and priority used. Sometimes you need to remove it after the plugin or theme adds it.

intermediate

What is the difference between remove_action and remove_filter?

remove_action removes functions hooked to actions, while remove_filter removes functions hooked to filters. Both work similarly but target different hook types.

Which function removes a function hooked to an action in WordPress?

A delete_action()

B remove_action()

C remove_hook()

D unset_hook()

The correct function to remove an action hook is remove_action().

What must you match exactly to successfully remove a hooked function?

A Function name and priority

B Function name only

C Priority only

D Hook name only

You must match both the function name and the priority used when adding the hook.

If a plugin adds a hook with priority 10, what happens if you try to remove it with priority 20?

A The hook is removed

B The hook runs twice

C Nothing, the hook stays

D An error occurs

The hook stays because the priority does not match.

Which hook type does remove_filter() target?

A Filter hooks

B Action hooks

C Both action and filter hooks

D Neither

remove_filter() targets filter hooks only.

When is the best time to remove a hook added by a plugin?

A It does not matter

B Before the plugin loads

C Before WordPress loads

D After the plugin loads

You need to remove the hook after the plugin has added it.

Explain how to remove a hook in WordPress and why matching priority is important.

Think about how WordPress identifies which function to remove.

Describe a scenario where you might want to remove a hook added by a plugin or theme.

Consider customizing a site without editing plugin files.