Magento Multiple Coupons Extension

To add/update a coupon just set the coupon(s) to the quote and save.

$quote->setCouponCode('foo,bar')->save();

This triggers a validation which must split the coupon string and validate each coupon, removing invalid codes from the string as it goes.

License

Licensed under the terms of the Open Software License v. 3.0 (OSL-3.0). See LICENSE.md or http://opensource.org/licenses/OSL-3.0 for the full text of the license.