MixedInvoiceItems = []; foreach ($param["MixedInvoiceItems"] as $key => $value) { $obj = new MixedInvoiceItem(); $obj->deserialize($value); array_push($this->MixedInvoiceItems, $obj); } } if (array_key_exists("RequestId", $param) and $param["RequestId"] !== null) { $this->RequestId = $param["RequestId"]; } } }