$serviceUrl = $webXmlRpcDir;
$username = '******';
$password = '******';
$debug = true;
function returnXmlRpcResponseData($oResponse)
{
    if (!$oResponse->faultCode()) {
        $oVal = $oResponse->value();
        $data = XML_RPC_decode($oVal);
        return $data;
    } else {
        die('Fault Code: ' . $oResponse->faultCode() . "\n" . 'Fault Reason: ' . $oResponse->faultString() . "\n");
    }
}
$oClient = new XML_RPC_Client($serviceUrl, $xmlRpcHost);
$oClient->setdebug($debug);
login($username, $password);
getAdvertiser($username, $password);
//logout($username, $sessionId);
// Logon
function login($username, $password)
{
    $aParams = array(new XML_RPC_Value($username, 'string'), new XML_RPC_Value($password, 'string'));
    $oMessage = new XML_RPC_Message('ox.logon', $aParams);
    $oResponse = $oClient->send($oMessage);
    if (!$oResponse) {
        die('Communication error: ' . $oClient->errstr);
    }
    $sessionId = returnXmlRpcResponseData($oResponse);
    echo '*** User logged on with session Id : ' . $sessionId . "<br>\n";
    return $sessionId;