Move WooCommerce Coupon form at checkout

wc-move-checkout-coupon-form.php

/**
 * Moves the WooCommerce form to enter a coupon code at checkout above order details rather than at the top of the page
 * Tutorial: http://www.sellwithwp.com/move-the-woocommerce-coupon-field/
**/

// Remove the coupon form from the top of checkout & re-add it above the order review
remove_action( 'woocommerce_before_checkout_form', 'woocommerce_checkout_coupon_form', 10 );
add_action( 'woocommerce_review_order_before_cart_contents', 'woocommerce_checkout_coupon_form' );


/**
 * Optional: Change the coupon message because the form javascript is teh broke
 * The form will just stay open rather than have the 'accordion' effect, but you could fix it instead if preferred
**/
add_filter( 'woocommerce_checkout_coupon_message', 'sww_change_wc_coupon_message' );
function sww_change_wc_coupon_message( $message ) {
	return 'Have a coupon? Enter your code and click "Apply Coupon".';
}