AddOrder issue on WHMCS API

I'm adding a new order using WHMCS local API. Everything works fine except domainrenewals fields.

if(!empty($_POST['renewalids']))
{
$postarray = array();
$postarray['action'] = 'addorder';
$postarray['clientid'] = \Yii::$app->user->identity->id;
$postarray["paymentmethod"] = "paypal";

foreach($_POST['renewalids'] as $key=>$id)
{
$priceselected = $_POST['renewalperiod'][$key];
$price = explode('_',$priceselected);
$postarray["domainrenewals[".$id."]"] = $price[0]; #renew for 1 year
/*$postarray["domainrenewals"][$id] = $price[0];*/
}

$orderDetails = WHMCSAPI::callApi($postarray);

its giving me error "No items added to cart so order cannot proceed".
Do you have any suggestion?

I think you might want to take another look at the documentation for [addorder][1], the way you are building the `$postarray["domainrenewals"]` value is incorrect. Assigning `$postarray["domainrenewals"]` should look something like this:

$postarray["domainrenewals"]['example.com'] = 1; //renew example.com for 1 year

It looks like for some reason you are using an ID instead of the domain name, I don't think that will work.
[1]:

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