How to add a Custom Meta Box for more than one Post Type?

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I am using the following code in functions.php for adding a custom meta box.

The custom post type is themes. I want to add more post types, how can I?

add_meta_box( 
    'my-meta-box-id', 
    'Demo & Download', 
    'cd_meta_box_cb', 
    'themes', 
    'normal', 
    'high' 
);
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1 comment

  1. Whenever in doubt about a WordPress function, consult the Codex.
    http://codex.wordpress.org/Function_Reference/add_meta_box

    There, you’ll see that you need to add one meta box to each post type.

    add_action( 'add_meta_boxes', 'myplugin_add_custom_box' );

function myplugin_add_custom_box() {
    add_meta_box( 
        'myplugin_sectionid',
        __( 'My Post Section Title', 'myplugin_textdomain' ),
        'myplugin_inner_custom_box',
        'post' 
    );
    add_meta_box(
        'myplugin_sectionid',
        __( 'My Post Section Title', 'myplugin_textdomain' ), 
        'myplugin_inner_custom_box',
        'page'
    );
}