# Update coupon

Use the **updatePromotionCoupon** method to add single or multiple coupons to a promotion.

Updating a promotion with multiple coupons causes any existing single coupon to be removed.

## Request parameters

<table><thead><tr><th width="262">Parameter</th><th>Type / Description</th></tr></thead><tbody><tr><td><code>promotionCode</code></td><td><p><strong>Required (string)</strong></p><p>The code corresponding to the promotion that you want to update.</p></td></tr><tr><td><code>promotionCoupon</code></td><td><strong>Required (object)</strong></td></tr><tr><td><code>promotionCoupon.type</code></td><td><p><strong>Required (string)</strong></p><p>Coupon type. Available values: </p><ul><li>SINGLE (use in conjunction with Code)</li><li>MULTIPLE (use in conjunction with Codes)</li></ul></td></tr><tr><td><code>promotionCoupon.Code/Codes</code></td><td><p><strong>Required (string / array of strings)</strong></p><p>Coupon code (for SINGLE) or array of coupon codes (for MULTIPLE).</p></td></tr></tbody></table>

### Request sample

```php
<?php

require ('PATH_TO_AUTH');

// Promotion code corresponding to the promotion you want to add coupons to
$promotionCode = '';

// Define single coupon object
$promotionCoupon = new stdClass;
$promotionCoupon->Type = 'SINGLE';
$promotionCoupon->Code = 'YOUR_CODE_HERE';

// Define multiple coupon object
$promotionCoupon = new stdClass;
$promotionCoupon->Type = 'MULTIPLE';
$promotionCoupon->Codes = ['YOUR_CODE_1', 'YOUR_CODE_2'];

try {
    $updatedPromotion = $client->addPromotionCoupon ($sessionID, $promotionCode, $promotionCoupon);
}

catch (SoapFault $e) {
    echo "UpdatedPromotion: " . $e->getMessage();
    exit;
}

var_dump("UpdatedPromotion", $updatedPromotion);
```

## Response parameters

<table><thead><tr><th width="166">Parameter</th><th>Type</th></tr></thead><tbody><tr><td><code>promotionCoupon</code></td><td><strong>Object</strong></td></tr></tbody></table>


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