How to use has_nav_menu filter in WordPress

has_nav_menu filter

Filters whether a nav menu is assigned to the specified location.

To use has_nav_menu filter, first you have to register it using add_filter. You can write this code into functions.php of your activated theme or in a custom WordPress Plugin.

We at WePlugins always prefer to create a custom WordPress Plugin while using hooks so nothing breaks when you update your WordPress Theme in the future.

In the below live example, we have defined a function modify_has_nav_menu_defaults which takes 2 parameters and we registered using add_filter. The first parameter has_nav_menu is the name of the hook, the second parameter modify_has_nav_menu_defaults is the name of the function which needs to be called, the third parameter is the priority of calling the hook if the same hook is used multiple times and the last parameter is the number of arguments (if any) to be passed in the registered function.

Sometimes, you have to remove a registered hook so you can use remove_filter to remove has_nav_menu filter.

Parameters

Below are the 2 parameters required to use this hook.

• $has_nav_menu : (bool) Whether there is a menu assigned to a location.
• $location : (string) Menu location.

Live Examples

1. Basic Example

Below is an example of how you can use this hook.

    function weplugins_modify_has_nav_menu_defaults($has_nav_menu, $location) { 
        // Update the $has_nav_menu variable according to your website requirements and return this variable. You can modify the $has_nav_menu variable conditionally too if you want.
        return $has_nav_menu; 
    }
    // add the filter
    add_filter( "has_nav_menu", "weplugins_modify_has_nav_menu_defaults", 10, 2 );
    

2. Conditional Example

In this example, we conditionally modify the $has_nav_menu variable based on the location.

    function weplugins_modify_has_nav_menu_conditionally($has_nav_menu, $location) {
        if ($location == 'primary') {
            $has_nav_menu = true;
        }
        return $has_nav_menu;
    }
    // add the filter
    add_filter( "has_nav_menu", "weplugins_modify_has_nav_menu_conditionally", 10, 2 );
    

3. Removing the Hook

To remove a hook callback, use the example below.

    function weplugins_remove_has_nav_menu_hook() {
        remove_filter( "has_nav_menu", "weplugins_modify_has_nav_menu_defaults", 10, 2 );
    }
    add_action('init', 'weplugins_remove_has_nav_menu_hook');
    

Please make sure to provide the same callback function name, priority, and number of arguments while removing the hook callback.

Contact Us

If you need customization or assistance with this hook, feel free to Contact Us.