Definition: The action.default.php directive in WordPress allows for a default page to be generated by the site's entry point when a new post is created or edited. This allows plugins to extend functionality by providing a custom template for that page, allowing for customization. It’s used for example to display a different content on the homepage (default) than the main pages. Detailed definition: In WordPress, `action.default.php` is a directive in the `wp-config.php` file that controls default behavior of a site's entry point when a new post or edit is made. This includes displaying a custom template for the page called "default".
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