Question about Zend_Xml_Rpc_Server

Question

Zend Framework

The problem is, I pass a string (exactly a string!) to the xml-rpc client as an argument, and an array of one element with this value comes to the server, below is the code, who will tell you why it will be very grateful, even below is a temporary randomly found solution, which I don't like it because it's either a bug or something, someday it might stop working.

Client implementation
$urlXmlRpcServer = 'http://example.com/xml-rpc';
try
{
$xmlRpcClient = new Zend_XmlRpc_Client($urlXmlRpcServer);
$class = $xmlRpcClient->getProxy();
$check = $class->needString($value);
}
catch(Exception $e)
{}

Server implementation
/**
* function needString
* @param string $string
*/
function needString($string)
{
$value = $string;
//Code
}

$server = new Zend_XmlRpc_Server();
$server->addFunction('needString');
echo $server->handle();

Workaround
/**
* function needString
* @param string $string
*/
function needString($string)
{
ob_start();
print_r($string);
$value = ob_get_clean();
//Code
}

Answer 1

And so?

$check = $class->needString(new Zend_XmlRpc_Value_String($value));