Bulk discount @ Checkout Page

 /**

 * @snippet       Bulk discount @ Checkout Page

 * @how-to        Get CustomizeWoo.com FREE

 * @sourcecode    https://businessbloomer.com/?p=111758

 * @author        Rodolfo Melogli

 * @compatible    WooCommerce 3.5.4

 * @donate $9     https://businessbloomer.com/bloomer-armada/

 */

 

add_action( 'woocommerce_before_cart', 'bbloomer_apply_bulk_coupon' );

  

function bbloomer_apply_bulk_coupon() {

    $coupon_code = 'bulk';

   if ( WC()->cart->get_cart_contents_count() > 5 ) {

       if ( ! WC()->cart->has_discount( $coupon_code ) ) WC()->cart->add_discount( $coupon_code );

   } else {

      if ( WC()->cart->has_discount( $coupon_code ) ) WC()->cart->remove_coupon( $coupon_code );

   }

}