/**
 * Describe Dhcp Options Action Sample
 * Gives you information about one or more sets of DHCP options. You can specify
 * one or more DHCP options set IDs, or no IDs (to describe all your sets of DHCP options).
 * The returned information consists of:
 * - The DHCP options set ID
 * - The options  
 * @param Amazon_EC2_Interface $service instance of Amazon_EC2_Interface
 * @param mixed $request Amazon_EC2_Model_DescribeDhcpOptions or array of parameters
 */
function invokeDescribeDhcpOptions(Amazon_EC2_Interface $service, $request)
{
    try {
        $response = $service->describeDhcpOptions($request);
        echo "Service Response\n";
        echo "=============================================================================\n";
        echo "        DescribeDhcpOptionsResponse\n";
        if ($response->isSetResponseMetadata()) {
            echo "            ResponseMetadata\n";
            $responseMetadata = $response->getResponseMetadata();
            if ($responseMetadata->isSetRequestId()) {
                echo "                RequestId\n";
                echo "                    " . $responseMetadata->getRequestId() . "\n";
            }
        }
        if ($response->isSetDescribeDhcpOptionsResult()) {
            echo "            DescribeDhcpOptionsResult\n";
            $describeDhcpOptionsResult = $response->getDescribeDhcpOptionsResult();
            $dhcpOptionsList = $describeDhcpOptionsResult->getDhcpOptions();
            foreach ($dhcpOptionsList as $dhcpOptions) {
                echo "                DhcpOptions\n";
                if ($dhcpOptions->isSetDhcpOptionsId()) {
                    echo "                    DhcpOptionsId\n";
                    echo "                        " . $dhcpOptions->getDhcpOptionsId() . "\n";
                }
                $configurationList = $dhcpOptions->getConfiguration();
                foreach ($configurationList as $configuration) {
                    echo "                    Configuration\n";
                    if ($configuration->isSetKey()) {
                        echo "                        Key\n";
                        echo "                            " . $configuration->getKey() . "\n";
                    }
                    $valueList = $configuration->getValue();
                    foreach ($valueList as $value) {
                        echo "                        Value\n";
                        echo "                            " . $value;
                    }
                }
            }
        }
    } catch (Amazon_EC2_Exception $ex) {
        echo "Caught Exception: " . $ex->getMessage() . "\n";
        echo "Response Status Code: " . $ex->getStatusCode() . "\n";
        echo "Error Code: " . $ex->getErrorCode() . "\n";
        echo "Error Type: " . $ex->getErrorType() . "\n";
        echo "Request ID: " . $ex->getRequestId() . "\n";
        echo "XML: " . $ex->getXML() . "\n";
    }
}