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<?php
/*
 *  Adding Menu under setting plugin name
*/

function gpAlr_menu() {
    
    /*
     * Using add_menu_page function
     * add_menu_page( $page_title, $menu_title, $capability, $menu_slug, $function);
     */
    
    add_menu_page(
        'ALR',      // Plugin Title
        'Add ALR',  // Menu Title
        'manage_options', // Capability or user rights
        'alr',  // menu slug
        'gpAlr' //  function to show main home page
    );
}
add_action( 'admin_menu', 'gpAlr_menu');  // Admin Action hook to register function

?>