How to use lang_codes filter in WordPress

Are you diving deep into the WordPress world and looking to customize your site with hooks? The lang_codes filter is a handy feature that lets you tweak language codes effortlessly. As an Indian developer, I can tell you that using hooks like this one can make your WordPress site truly your own. You just need to register it using add_filter, and you’re ready to roll. It’s always a good idea to keep your customizations in a plugin so that updates don’t wipe them out. Let’s explore some live examples of how to use this filter.

Example 1: Modifying Language Codes

This example shows how you can modify the default language codes based on your website’s requirements.

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

Example 2: Removing a Hook Callback

If you ever need to remove a registered hook for any reason, here’s how you can do it.

    remove_filter( "lang_codes", "weplugins_modify_lang_codes_defaults", 10, 2 );
    

Ensure that you provide the same callback function name, priority, and number of arguments when removing the hook callback.

Example 3: Applying the lang_codes Filter

Here’s how to apply the lang_codes filter in your WordPress theme or plugin.

    apply_filters( 'lang_codes', string[] $lang_codes, string $code )