<?

include('xmlrpc.inc');

$arrayVal = array(
'name'=>new xmlrpcval('Fabien Pinckaers', "string") ,
'vat'=>new xmlrpcval('BE477472701' , "string")
);

$client = new xmlrpc_client("http://localhost:8069/xmlrpc/object");

$msg = new xmlrpcmsg('execute');
$msg->addParam(new xmlrpcval("dbname", "string"));
$msg->addParam(new xmlrpcval("3", "int"));
$msg->addParam(new xmlrpcval("demo", "string"));
$msg->addParam(new xmlrpcval("res.partner", "string"));
$msg->addParam(new xmlrpcval("create", "string"));
$msg->addParam(new xmlrpcval($arrayVal, "struct"));

$resp = $client->send($msg);

if ($resp->faultCode())

    echo 'Error: '.$resp->faultString();

else

    echo 'Partner '.$resp->value()->scalarval().' created !';

?>

http://doc.openerp.com/developer/6_22_XML-RPC_web_services/

Here is an example on how to insert a new partner using PHP. This example makes use the phpxmlrpc library, available on sourceforge.

OpenERP: XML-RPC Web services (Example)

PHP