Understanding WordPress Hooks: Actions and Filters Explained Through Code

Understanding WordPress Hooks: Actions and Filters Explained Through Code
WordPress hooks are essential for customizing and enabling interaction between different WordPress components. Functions attached to hooks handle common tasks in WordPress, like adding styles or scripts to a page, or wrapping footer text with HTML elements. The WordPress Core’s codebase contains thousands of hooks in over 700 locations, and themes and plugins have even more hooks.
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Action Hooks:
1) Action hooks allow you to execute custom functions at specific points in WordPress core, themes, or plugins.
2) They do not return any values and are used to trigger specific events or functions.
3) Other code can be executed before or after an action hook is called.
4) Examples of action hooks include init, wp_footer, admin_init, etc.
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Filter Hooks:
1) Filter hooks allow you to modify or filter data before it is displayed or processed.
2) They accept parameters, process them, and return them back to the original calling function.
3) Other code can modify or manipulate the data passed through a filter hook.
4) Examples of filter hooks include the_content, the_title, wp_nav_menu_items, etc.
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