add admin menu in wordpress code example

Example 1: add admin menu link custom wp

add_action( 'admin_menu', 'register_custom_menu_link' );
/**
 * @author    Brad Dalton
 * @example   http://wpsites.net/wordpress-admin/add-top-level-custom-admin-menu-link-in-dashboard-to-any-url/
 * @copyright 2014 WP Sites
 */
function register_custom_menu_link(){
    add_menu_page( 
      'custom menu link', 
      'Your Menu Link', 
      'manage_options', 
      'any-url', 
      'wpsites_custom_menu_link', 
      'dashicons-external', 3
    ); 
}

function wpsites_custom_menu_link(){
    wp_redirect( 'http://www.example.com', 301 ); 
	exit;
}

Example 2: add new admin to wordpress

INSERT INTO `databasename`.`wp_users` (`ID`, `user_login`, `user_pass`, `user_nicename`, `user_email`, `user_url`, `user_registered`, `user_activation_key`, `user_status`, `display_name`) VALUES ('4', 'demo', MD5('demo'), 'Your Name', '[email protected]', 'http://www.test.com/', '2011-06-07 00:00:00', '', '0', 'Your Name');
 
 
INSERT INTO `databasename`.`wp_usermeta` (`umeta_id`, `user_id`, `meta_key`, `meta_value`) VALUES (NULL, '4', 'wp_capabilities', 'a:1:{s:13:"administrator";s:1:"1";}');
 
 
INSERT INTO `databasename`.`wp_usermeta` (`umeta_id`, `user_id`, `meta_key`, `meta_value`) VALUES (NULL, '4', 'wp_user_level', '10');