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The e-commerce.

Discount Coupon Codes not accepting NULL entry...


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Everything with the "Discount Coupon Codes" contribution works perfectly except when you try to checkout a normal order without a coupon code. Here is the contribution I am working with:




The checkout_payment.php asks for a Coupon Code if you have one. However, if you leave this field blank and attempt to continue to the checkout_confirmation.php screen, it just returns you back to the checkout_payment.php screen with no error message. According to the code in checkout_confirmation.php it is using the tep_not_null() function to see if the coupon field is emtpy before continuing as normal:


if( tep_not_null($HTTP_POST_VARS['coupon']) ) { //if they have entered something in the coupon field


However it does not appear to work properly. As I stated above, instead of just continuing on with the checkout_confirmation.php as normal without a discount, it just reverts me back to checkout_payment.php. Here is the function from general.php if it helps:


function tep_not_null($value) {

if (is_array($value)) {

if (sizeof($value) > 0) {

return true;

} else {

return false;


} else {

if (($value != '') && (strtolower($value) != 'null') && (strlen(trim($value)) > 0)) {

return true;

} else {

return false;





Any help would be greatly appreciated!!




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