Is it possible to modify the media library admin screen?

That area of all admin screens is where admin notices are displayed, so you could generate an admin notice. Here’s a suitable function and hook: function wpse_233031_admin_notice() { ?> <div class=”notice notice-info”> <p>Your message here!</p> </div> <?php } function wpse_233031_hook_admin_notice() { add_action( ‘admin_notices’, ‘wpse_233031_admin_notice’ ); } add_action( ‘load-upload.php’, ‘wpse_233031_hook_admin_notice’ ); /* Edited out anonymous function … Read more

How to override languages files in wp-content/languages/themes with child theme

Since WP 4.6 load_theme_textdomain() (and consequently load_child_theme_textdomain()) will give priority to .mo files downloaded from WP’s online translation platform (translate.wordpress.org). Due to some new code (here, on line 769) these functions will completely ignore your local .mo files if the textdomain is found in the general languages/ directory. You can, however, use the more basic … Read more

How to filter content post only on save

Look at ‘save_post’ and Post Status Transitions. save_post is an action triggered whenever a post or page is created or updated, which could be from an import, post/page edit form, xmlrpc, or post by email. The data for the post is stored in $_POST, $_GET or the global $post_data, depending on how the post was … Read more

Can I trigger the publish_post hook by using wp_insert_post?

It’s triggered in wp_publish_post() that calls: wp_transition_post_status( ‘publish’, $old_status, $post ); that fires up action calls, dynamically with: do_action( “{$new_status}_{$post->post_type}”, $post->ID, $post ); where “{$new_status}_{$post->post_type}” becomes “publish_post” in your case.

Why is ‘nav_menu_item_args’ filter’s $item argument empty?

Filters (and actions) need to be declared with the number of arguments accepted by the callback; it is the fourth parameter of add_filter() (default 1): add_filter( ‘nav_menu_item_args’, ‘filter_nav_menu_item_args’, 10, 3 ); function filter_nav_menu_item_args( $args, $item, $depth ) { print_r( $item ); return $args; } See add_filter() for reference.

How can i trigger an action manually?

Use do_action, you can just: do_action( ‘my_action’); if your action has a callback function that need arguments say: function my_callback( $an_array ){ //use the array for something here var_dump($an_array); } add_action( ‘my_action’, ‘my_callback’ ); you can specify it in the do_action like this: do_action( ‘my_action’, array( ‘array_for_callback’) );

Seeking Hook Whenever a Custom Taxonomy Term Has Been Added

create_category runs when a new category is created, in turn set_object_terms fires after a terms have been set to object. The hooks you are looking for are: create_{$taxonomy} – new term in a specific taxonomy is created created_{$taxonomy} – new term created, term cache has been cleaned create_term created_term

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