Hide specific payment methods for new customers in WooCommerce 8+

Question

I created a script to check if the user has a completed order. If the user has no completed order, it disables the payment method "cheque". This script works, but after adding it to my functions.php file, I have severe performance issues when browsing the page. Do you see some optimization possibilities or where the problem might be?

function has_bought() {
    // Get all customer orders
    $customer_orders = get_posts( array(
        'numberposts' => -1,
        'meta_key' => '_customer_user',
        'meta_value' => get_current_user_id(),
        'post_type' => 'shop_order', // Post type of WC order
        'post_status' => 'wc-completed' // Only orders with status "completed"
    ) );
    // Return "true" when the customer already has an order
    return count( $customer_orders ) > 0 ? true : false;
}

add_filter('woocommerce_available_payment_gateways', 'customize_payment_gateways');
function customize_payment_gateways($gateways) {
    if (!has_bought()) {
        if (isset($gateways['cheque'])) {
            //Cancel the "cheque" payment gateway
            unset($gateways['cheque']);
        }
    }
    return $gateways;
}

Answer 1

No need to repeat the query to check if the customer has a paid order, there is already a lightweight built-in function in the WC_Customer class, use get_is_paying_customer()Method, which uses a metadata specific to the user.

You can use it like this to disable the "Check" payment method for new customers:

add_filter('woocommerce_available_payment_gateways', 'cheque_payment_gateway_only_for_paying_customers');
function cheque_payment_gateway_only_for_paying_customers($gateways) {
    if ( ! WC()->customer->get_is_paying_customer() && isset($gateways['cheque']) ) {
        unset($gateways['cheque']); // 取消“支票”付款选项
    }
    return $gateways;
}

Put the code into your child theme’s functions.php file (or into a plugin). Tested and working fine.