The 'admin_head-media-upload-popup' PHP action is a WordPress hook triggered during media upload popup display.

The 'admin_notices' action in WordPress is a powerful tool for displaying messages to users on the admin dashboard.

The 'admin_page_access_denied' PHP action in WordPress restricts access to admin pages based on user roles or capabilities.

​Learn how to use the WordPress `admin_post_send_email_notifications` PHP action, which fires on an authenticated admin post request where no action is supplied. Add the action using `add_action()` and customize it…

Learn how to use the WordPress `admin_post_delete_custom_post_type_item` PHP action to delete a custom post type item and redirect the user to a specific page. This action is fired on an…

​The `admin_post_nopriv` WordPress action is used when a non-authenticated user submits a request to the `admin-ajax.php` file without specifying an action. This article provides examples on how to use this…

​[Learn how to use the ](https://www.wpbeginner.com/php-tutorials/using-wordpress-admin-post-nopriv-action/) `admin_post_nopriv_{$action}` PHP action in WordPress. This action fires on a non-authenticated admin post request

The 'admin_post_thumbnail_html' PHP filter allows developers to customize the HTML output of the post thumbnail box in the WordPress admin panel.

The 'admin_post_thumbnail_size' PHP filter in WordPress allows developers to customize the size of the featured image thumbnail in the admin panel.