Automatically add login or logout and Register in Menu

// Automatically Add login or logout Option Item in Menu

add_filter( 'wp_nav_menu_items', 'add_logout_link', 10, 2);
/**
* Add a login link to the members navigation
*/
function add_logout_link( $items, $args )
{
if($args->theme_location == 'bishop_menu')
{
if(is_user_logged_in())
{
$items .= '<li><a href="'. wp_logout_url() .'">Log Out</a></li>';
} else {
$items .= '<li><a href="'. wp_login_url() .'">Log In</a></li>';

}

}
return $items;
}





/**
* Add a login link to the members navigation
*/
function register( $items, $args )
{
if($args->theme_location == 'bishop_menu')

$items .= '<li><a href="'.get_bloginfo('url').'/wp-login.php?action=register">REGISTER</a></li>';


return $items;
}

add_filter( 'wp_nav_menu_items', 'register', 10, 2);