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Some examples of filters would include customizing how excerpts are displayed or adding some custom code to the end of a blog post.At first, it may be a little confusing to figure out whether something is an action or a filter.

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The last parameter is used less often and it is for when you need to pass or accept multiple arguments.

How to Hook into an Filter The add_filter works the same way as add_action.

The priority is an optional integer value based on a scale of 1 to 999 that determines the priority of order for functions tied to that specific hook.

Higher priority means it runs later, lower priority means earlier.

Two types of hooks exist in Word Press: actions and filters.

An Action in Word Press is a hook that is triggered at specific time when Word Press is running and lets you take an action.

For actions, you’ll want to know the name of the hook, as well as when exactly it runs.

For filters, you also need to know the name of the hook, but you want to know what value you are going to get and have to return, as well.

You will also have to be careful because sometimes a hook exists as both an action and a filter, or a filter and a function.

You will see the real difference with the actual function you call.

How to Unhook from Actions and Filters To remove a hook is quite simple.

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