One metabox for multiple post types

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I have this code 

function add_custom_meta_box() {
add_meta_box(
    'custom_meta_box', // $id
    'Custom Meta Box', // $title 
    'show_custom_meta_box', // $callback
     'page', // $page    
    'normal', // $context
    'high'); // $priority
}
add_action('add_meta_boxes', 'add_custom_meta_box');

I want to add more post type like page,post,custom_post_type in this code

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  'page', // $page

How should I rewrite my code?

Post Views: 1

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2 comments

  1. Define an array of post types, and register the metabox for each one separately:

    function add_custom_meta_box() {

    $post_types = array ( 'post', 'page', 'event' );

    foreach( $post_types as $post_type )
    {
        add_meta_box(
            'custom_meta_box', // $id
            'Custom Meta Box', // $title 
            'show_custom_meta_box', // $callback
             $post_type,
            'normal', // $context
            'high' // $priority
        );
    }
}

  2. If your aim is to add all post types, then you can get the array of post types with:

    $post_types = get_post_types( array('public' => true) );

    Or add an argument for WP core post types or custom ones:

    // only WP core post types
$post_types = get_post_types( array('public' => true, '_builtin' =>‌ true) );

// only custom post types
$post_types = get_post_types( array('public' => true, '_builtin' =>‌ false) );

    Use it like this:

    add_meta_box(
    'custom_meta_box', // $id
    'Custom Meta Box', // $title 
    'show_custom_meta_box', // $callback
     $post_types,
    'normal', // $context
    'high' // $priority
);