How to check coupen code is applied or not before order place in Magento - magento source24

👉 Hello Magento friends today's i'm share with you to How to check coupen code is applied or not before order place in Magento 

create a button.phtml file on given path : 

/app/design/frontend/base/default/template/checkout/onepage/review/button.phtml

<button type=”submit”  id=”checkoutBtn” title=”<?php echo $this->__(‘Place Order’) ?>”><span><span><?php echo $this->__(‘Place Order’) ?></span></span></button>

            <?php

            $coupon_code = Mage::getSingleton(‘checkout/session’)->getQuote()->getCouponCode();

            if ($coupon_code) {

                $coupon_code = ‘yes';

                        } else {

                        $coupon_code = ‘no';

            }

            ?>

<script type=”text/javascript”>

    jQuery(document).ready(function(){

    jQuery(‘#checkoutBtn’).click(function() {

    var ccode = ‘<?php echo $coupon_code; ?> > ';

            if (ccode == ’yes’)

            {

            review.save();

                    }

    else {

    alert(‘Please Enter coupon code Before Order Place’);

            return false;

            }

    });

            });

</script>