How to Use WordPress Action Hooks in Theme Customization
WordPress hooks work somewhat similar to real-life hooks in the sense that you can catch the fish you want at the right spot if you properly use them.
You can remove a caught function (e.g. you can remove the WordPress admin bar for low-level users), you can leave it intact and enhance it with your own functionality (e.g. you can add more menus or widget areas to a theme), or you can override it (e.g. you can modify the behavior of a core function).
There are two different kind of hooks in WordPress: actions and filters. In this post we will take a look at how we can make use of action hooks in theme customization.
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