// example custom dashboard widget
    function custom_dashboard_widget() {
    echo "<p>Hello World</p>";
    }
    function add_custom_dashboard_widget() {
    wp_add_dashboard_widget('custom_dashboard_widget', 'Some text exaplining things', 'custom_dashboard_widget');
    }
    add_action('wp_dashboard_setup', 'add_custom_dashboard_widget');