Ajax缺少参数

I m posting an array along with a variable in ajax like

$.post(pageURL,{data:data,id:linkid},function showData(Data)
{

})

at pageURL the data object is accessible but the id is missing . I tried pushing that id in data array like

data['id']=linkid

but still i cant manage to get that id at pageURL (though i can see that "id" posted in my call header). On pageURL i am trying to get values using print_r($_REQUEST['data']['id']);

my request headers are

You should add id in your data object. like this

 data['id']=linkid

Then post it in ajax request.

 $.post(pageURL, { data: data }, function showData(Data) {

       });

Then you will be able to access it using data object.

$_REQUEST[data[id]]'

Complete code.

 data.id = linkid;
       $.post(pageURL, { data: data }, function showData(Data) {

       })

To get the id you simply do

print_r($_POST['id']);

if this doesn't work you can try to change the name of the value

{data:data,linkid:linkid}
 print_r($_POST['linkid']);

Try to access $_POST['data']['id']

i don't know why but just shuffling the places like

$.post(pageURL,{id:linkid,data:data},function showData(Data)
{

})

solved the issue. if anybody can explain why it solved like this it would be helpful. Thanks