在Wordpress functions.php中替换PHP代码

Question

I'm trying to add a last item to the wordpress primary menu. So here is my question:

I have a code in functions.php that works well:

function add_last_nav_item($items) {
  return $items .= '<li><a href="#" >Contact</a></li>';
}
add_filter('wp_nav_menu_items','add_last_nav_item');

I need to replace which is inside the <li> tags with this:

<li><?php if(function_exists(wp_forecast)) { wp_forecast( wp_forecast("A") ); } ?></li>

I tried but it doesn't work.

Answer 1

Try this:

function add_last_nav_item($items) {
    ob_start();

    echo '<li>';

    if (function_exists('wp_forecast')) { 
        wp_forecast( wp_forecast("A") );
    }

    echo '</li>';

    $end = ob_get_clean();
    $items = $items . $end;
    return $items;
}
add_filter('wp_nav_menu_items','add_last_nav_item');