How to Limit Coupon Use to Cart Quantity

In WooCommerce, coupons are a great way to offer discounts to your customers. However, sometimes you may want to limit the number of coupons that can be applied to an order, especially if you are running a promotion with a limited number of coupons available.

In this article, we will show you how to use the woocommerce_applied_coupon hook to limit the number of coupons in the cart to not greater than the cart quantity.

The woocommerce_applied_coupon hook is triggered after a coupon has been applied to an order. By using this hook, we can check the number of coupons applied and limit it to the cart quantity.

Here is an example of how to use the woocommerce_applied_coupon hook to limit the number of coupons in the cart:

add_action( 'woocommerce_applied_coupon', 'wp_daily_limit_coupons_in_cart' );
function wp_daily_limit_coupons_in_cart( $coupon_code ) {
	// Get cart
	$cart = WC()->cart;
	
	// Get coupon count
	$coupon_count =  count( $cart->get_applied_coupons());
	
	// Get cart quantity
	$cart_quantity = $cart->get_cart_contents_count();
	
	// If coupon count is greater than cart quantity, remove the last coupon
	if ( $coupon_count > $cart_quantity ) {
		$cart->remove_coupon( $coupon_code );
		wc_clear_notices();
		wc_add_notice( __( 'Coupon count is greater than cart quantity.' ), 'error' );
	}
}

In this example, the wp_daily_limit_coupons_in_cart function is called when the woocommerce_applied_coupon hook is triggered. The function first gets the cart, the number of coupons applied to the cart, and the cart quantity. It then checks if the number of coupons applied is greater than the cart quantity. If it is, it removes the last coupon applied and displays an error notice to the customer.

By using this function, you can limit the number of coupons in the cart to not greater than the cart quantity, which helps to ensure that your promotions are fair and that you do not lose money on excessive discounts.

In conclusion, the woocommerce_applied_coupon hook is a powerful tool that allows you to modify the behavior of coupons in your WooCommerce store. By using this hook, you can limit the number of coupons in the cart to not greater than the cart quantity and ensure that your promotions are fair and profitable.