How to enable additional page in WordPress custom plugin?

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I have a custom WordPress plugin that is showing me a list of data from database. I am registering it\'s page via:

add_menu_page( 
    \'Naročila\', 
    \'V


                      
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          1条回答        

        
                         				            
            
           
            
                              
                
              
              
                
                  无人共我        
                
              
                            
                2020-12-22 04:25
              
            
            
                                                                       
You can create a sub menu page and pass null as its parent:


  $parent_slug

  Use NULL or set to 'options.php' if you want to create a page that doesn't appear in any menu.


A demo:

add_action('admin_menu', function() 
{
    # Main page
    add_menu_page( 
        'Vsa', 
        'Vsa', 
        'add_users', // Capability, not role
        'listaj-narocila', 
        function(){ 
            printf(
                '<h2>%s</h2><a href="%s">%s</a>',
                __( 'Main page' ),
                admin_url( 'admin.php?page=single-norcilo&id='.rand(1,25) ),
                __( 'Hidden sub page' )
            );
        },
        'http://sstatic.net/stackexchange/img/favicon.ico'
    );  

    # Child page    
    $hook = add_submenu_page(
        null,
        'Norcilo',
        'Norcilo',
        'add_users',
        'single-norcilo',
        function(){ 
            printf(
                '<h2>%s</h2><a href="%s">%s</a>',
                __( 'Hidden sub page' ),
                admin_url( 'admin.php?page=listaj-narocila' ),
                __( 'back' )
            );
        }
    );

    # Enqueue script in submenu page to fix the current menu indicator
    add_action( "admin_footer-$hook", function()
    {
        echo <<<HTML
<script type="text/javascript">
jQuery(document).ready( function($) {
    $('#toplevel_page_listaj-narocila')
        .removeClass('wp-not-current-submenu')
        .addClass('current');
});     
</script>
HTML;

    });
});


_{An alternative approach: https://wordpress.stackexchange.com/a/114818/12615}
                                                                        
                                                        
            
            
              
                
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