check if woocommerce cart is empty or not

check_woocommerce_cart.php

<?php

function is_empty_cart() {
	if ( ! class_exists( 'woocommerce' ) ) {
		return false; //Woocpmmerce isn't isntalled
	}
	if ( sizeof( WC()->cart->get_cart() ) > 0 ) {
		return false; //Cart is not empty
	}

	return true; //Cart is empty
}