Apply Wordpress function on specific woocommerce product categories only

Question

I have the following function which I need to apply on a particular category only:

function ChangeSelectTitle($woocommerce_product_categories_widget_args){
$woocommerce_product_categories_widget_args['show_option_none'] = __('Select your Device/Brand');
return $woocommerce_product_categories_widget_args;
}

if( $product_cat_id == 6 ) {
add_filter('woocommerce_product_categories_widget_dropdown_args', 'ChangeSelectTitle');
}

The category ID is 6. I have tried putting $product_cat_id == 6to identify the category page but it's not working. How to make it work?

Answer 1

You're trying to use $product_cat_id even though it isn't defined anywhere. If you want to know the current category being viewed you need to use is_product_category(6), but you need to use that inside the callback function (ChangeSelectTitle()), because WordPress hasn't determined whether it's a category archive yet when it runs functions.php.

function ChangeSelectTitle($woocommerce_product_categories_widget_args) {
    if ( is_product_category(6) ) {
        $woocommerce_product_categories_widget_args['show_option_none'] = __('Select your Device/Brand');
    }

    return $woocommerce_product_categories_widget_args;
}
add_filter('woocommerce_product_categories_widget_dropdown_args', 'ChangeSelectTitle');