How to use restrict_manage_posts action in WordPress

restrict_manage_posts action

Looking to add more filters in your post or page listing page in the WordPress back end? If yes, you can use the restrict_manage_posts action to do this.

To use restrict_manage_posts action, first you have to register it using add_action. You can write this code into functions.php of your activated theme or in a custom WordPress Plugin.

We at Flipper Code, always prefer to create a custom WordPress Plugin while using hooks so nothing breaks when you update your WordPress Theme in the future.

In the below live example, we have defined a function execute_on_restrict_manage_posts_event which takes 2 parameters and we registered using add_action. The first parameter restrict_manage_posts is name of the hook, The second parameter execute_on_restrict_manage_posts_event is name of the function which need to be called, third parameter is the priority of calling the hook if same hook is used multiple times and the last parameter is the number of arguments (if any) to be passed in the registered function.

Sometime, you have to remove a registered hook so you can use remove_action to remove restrict_manage_posts action.

Parameters

Below are the 2 parameters are required to use this hook.

• $post_type : (string) The post type slug.
• $which : (string) The location of the extra table nav markup: ‘top’ or ‘bottom’ for WP_Posts_List_Table, ‘bar’ for WP_Media_List_Table.

Live Example

function add_admin_filters( $post_type ){


	if( 'post' !== $post_type ){
		return;
	}

	$taxonomies_slugs = array(
		'post_tag'
	);
	// loop through the taxonomy filters array
	foreach( $taxonomies_slugs as $slug ){
		$taxonomy = get_taxonomy( $slug );
		$selected = '';
		// if the current page is already filtered, get the selected term slug
		$selected = isset( $_REQUEST[ $slug ] ) ? $_REQUEST[ $slug ] : '';
		// render a dropdown for this taxonomy's terms
		wp_dropdown_categories( array(
			'show_option_all' =>  $taxonomy->labels->all_items,
			'taxonomy'        =>  $slug,
			'name'            =>  $slug,
			'orderby'         =>  'name',
			'value_field'     =>  'slug',
			'selected'        =>  $selected,
			'hierarchical'    =>  true,
		) );
	}
}

add_action( 'restrict_manage_posts', 'add_admin_filters', 10, 1 ); 

To remove a hook callback, use the example below.

remove_action( "restrict_manage_posts", "execute_on_restrict_manage_posts_event", 10, 2 );

Please make sure provide the same callback function name, priority and number of arguments while removing the hook callback.

Flipper Code is a Premium WordPress Plugins development company and integrating new functionalites into WordPress sites in form of custom WordPress Plugins since 2012. If you’re having any trouble using this hook, please contact our WordPress Development Team and we’d be happy to assist you.