add_meta_boxes │ action-hook │ WP 3.0.0

Allows you to register a meta box for any post type. Fires after all built-in meta boxes have been added.

Receives 2 parameters: $post_type, $post.

Usage

add_action( 'add_meta_boxes', 'wp_kama_add_meta_boxes_action', 10, 2 );

/**
 * Function for `add_meta_boxes` action-hook.
 * 
 * @param string                    $object_type The type of the current object that meta boxes were added to.
 *                                    Can be 'post', 'page', custom post types, 'comment', or
 *                                    'link'.
 * @param WP_Post|WP_Comment|object $object      The post, comment, or link object. Type varies depending on
 *                                    `$object_type`.
 *
 * @return void
 */
function wp_kama_add_meta_boxes_action( $object_type, $object ){
	// action...
}

Parameters

$post_type(string)

The name of the post type whose editing screen invoked the hook.

$post(WP_Post)

The post object: a WP_Post object.

Examples

#1 Add a meta box to the post editing screen

add_action( 'add_meta_boxes', 'adding_custom_meta_boxes', 10, 2 );
function adding_custom_meta_boxes( $post_type, $post ) {
	add_meta_box( 'my-meta-box', 'My meta box', 'render_my_meta_box', 'post', 'normal', 'default' );
}

function render_my_meta_box(){
	echo 'Meta box HTML';
}

#2 Use the similar add_meta_boxes_{post_type} hook

This code does the same thing as the first example, but the post type is specified directly in the hook name.

add_action( 'add_meta_boxes_'.'post', 'adding_custom_meta_boxes' );
function adding_custom_meta_boxes( $post ) {
	add_meta_box( 'my-meta-box', 'My meta box', 'render_my_meta_box', 'post', 'normal', 'default' );
}

function render_my_meta_box(){
	echo 'Meta box HTML';
}