Distinguish between page and post in function
By using post id you can get post type of current post/page. try below code. i have tested and it is working fine for me. add_filter( ‘admin_post_thumbnail_html’, ‘foo’,10,3 ); function foo( $content, $post_id, $thumbnail_id ) { if ( get_post_type( $post_id ) == ‘page’ ) { $content=”<p>foobar</p>” . $content; } else{ $content=”<p>barfoo</p>” . $content; } return … Read more