WooCommerce Checkout url hook - Change condition based on product category

Question

Wondering if anyone could help me to customize this code. I would like to change the applied condition in this code:

add_filter( 'woocommerce_get_checkout_url', 'change_checkout_url', 30 );
function change_checkout_url( $url ) {
    $allowed_countries = array('NO');
    $customer_country = WC()->customer->get_default_country();
    if( !in_array( $customer_country , $allowed_countries ) ) {
        $url = wc_get_page_permalink( 'checkout' );
    }
    return $url;
}

Is it possible instead, for products that belongs to some category in WooCommerce, to have a custom checkout url?

Answer 1

2020 Update: Only for WooCommerce 3+

Yes it's possible, making some changes:

add_filter( 'woocommerce_get_checkout_url', 'custom_checkout_url', 30 );
function custom_checkout_url( $checkout_url ) {

    // Define your product categories (term Id, slug or name)
    $categories = array('Cat name1', 'Cat name2'); 
    $custom_url = 'http://my_custom_url.com/checkout/'; // <= custom URL

    $cart_items = WC()->cart->get_cart();

    if ( sizeof($cart_items) > 0 ) {
        foreach ( $cart_items as $cart_item ) {
            if( has_term( $categories, 'product_cat', $cart_item['product_id'] ) ){
                 return $custom_url;
            }
        }
    }
    return $checkout_url;
}

This code goes in your plugin file or on function.php file of your active child theme or theme

References:

• Display WooCommerce checkout link
• Using has_term( $category, 'product_cat') for WC products category condition
• Get Cart products id on checkout WooCommerce page, to display product images