isExist

array|boolean public static
\Bitrix\Sale\DiscountCouponsManager::isExist(
 string $coupon
);

When coupon with $coupon exist, the method returns array with coupon parameters with keys:

• ID - coupon ID;
• COUPON - coupon code;
• MODULE_ID - module ID.

This static method is used when verifying coupon uniqueness among all modules

Parameters

Example