Free Freight With Coupon

I am trying to edit the eCart object Shipping Cost such that when there is a coupon value greater than zero, freight is also zero. I tried to add a rule to the existing cart that reads per the attached file, but it also seemed to zero out freight on an order where the user did not enter a coupon code.

The issue is that if the Session variable isn't set it isn't = 0... Try using this condition instead: "custom expression evaluates to true" and the expression is:
(isset($_SESSION['PromoCodeValue'])?$_SESSION['PromoCodeValue']:'0') == 0

When I posted the new eCart1.php, I immediately got this error:

Parse error: syntax error, unexpected '"', expecting T_STRING in /home/content/05/11651305/html/1to1-silpada/WA_eCart/eCart1_PHP.php on line 112

Please attach a current copy of the cart file so I can look at that line.

Originally Said By: Ray Borduin

  Please attach a current copy of the cart file so I can look at that line.  

See attached.

i used double quotes in my example and it looks like you need to use single quotes. Update line 112 to:
if (true && (("UPS"=="UPS")&&(isset($_SESSION["eCart1_UPS_Quote"]))&&(floatval($_SESSION["eCart1_UPS_Quote"]) > 0) && (( (isset($_SESSION['PromoCodeValue'])?$_SESSION['PromoCodeValue']:'0') == 0 )))) {

Thank you, that worked!