Wordpress add submenu

add_menu_page('My Custom Page', 'My Custom Page', 'manage_options', 'my-top-level-slug');
add_submenu_page( 'my-top-level-slug', 'My Custom Page', 'My Custom Page',
    'manage_options', 'my-top-level-slug');
add_submenu_page( 'my-top-level-slug', 'My Custom Submenu Page', 'My Custom Submenu Page',
    'manage_options', 'my-secondary-slug');

Source: developer.wordpress.org

Similar codes

0 vote366 views1 answer
Wordpress logout redirect to home
PHP Wordpress
0 vote330 views1 answer
Wordpress if admin
PHP Wordpress
0 vote448 views1 answer
Wordpress highlight text excerpt
PHP Wordpress
0 vote406 views1 answer
Wp plugins action link
PHP Wordpress
0 vote325 views1 answer
Wordpress how to match password
PHP Wordpress
1 vote388 views2 answers
Insert data to table in wordpress 2
PHP Wordpress
3 votes354 views2 answers
Wordpress get template url
PHP Wordpress
3 votes314 views4 answers
Get base url in wordpress
PHP Wordpress
5 votes369 views1 answer
Wordpress get taxonomy of a post
PHP Wordpress
0 vote351 views1 answer
Fallo al conectar al servidor ftp wordpress
PHP Wordpress