if( !$form->isValid($this->getRequest()->getPost()) ) {
return;
}
// Process
$values = $form->getValues();
if( ($CouponCode = $form->getElement(‘coupon_code’)) &&
isset($values[‘coupon_code’])) {
$iCouponExist = $table->checkCouponExist($values[‘coupon_code’]);
if($iCouponExist == 1) {
return $CouponCode->addError(‘This Coupon Code is not available, please use another one.’);
}
}