基于this Answer by t31os.

这里，所有的元框都被设置为不可见，所以只需从数组中删除那些应该可见的元框即可。

add_action(\'user_register\', \'wpse_58645_set_user_metaboxes\');

function wpse_58645_set_user_metaboxes( $user_id ) 
{
    update_user_meta( 
        $user_id, 
        \'metaboxhidden_post\', 
        array( 
            \'authordiv\',
            \'categorydiv\',
            \'commentstatusdiv\',
            \'formatdiv\',
            \'postcustom\',
            \'postexcerpt\',
            \'postimagediv\',
            \'slugdiv\',
            \'tagsdiv-post_tag\',
            \'trackbacksdiv\',
        ) 
    );
}

$blogusers = get_users(\'blog_id=1\');

foreach ( $blogusers as $user ) 
{
    if ( !get_user_meta( $user->ID, \'metaboxhidden_post\', true ) ) 
    {
        update_user_meta( $user->ID, \'metaboxhidden_post\', $meta_value );
    }
}