help...how use fnServerparms..

wwilly

first time, please excuse my english but i m french so ...
i would like to say : thank you for your plugin because it s very nice and i think it can be use for most thinks....so thank you
i m novice and i have a question for use the fnserverparams to passe some arguments to a page for ajax
this is my code :

$.ajaxSetup( {'type': 'POST', 'url':'sourcepdo.php', 'dataType': 'json' } );
var oPostData = {'hello':'there'};
var oTable = $('#example').dataTable(
{
"sScrollY": "200px",
"bProcessing": true,
"sPaginationType": "full_numbers",
"bJQueryUI": true,
"bServerSide": true,
'sAjaxSource': $.ajaxSettings.url,
'aoAjaxData':oPostData,
"oLanguage": { "sUrl": "fr_txt.txt
}
now how can i do for retrieve my arguments (hello) in my page : sourcepdo.php
must i write : $v=$_get['hello'] ?
thanks for your help
wwilly