Question

$toolTip_inner.load('ajax/fetchUser_data.php',{ id: $tooltipText });

I am trying to load the content of the php file to toolTip_inner and passing the parameters..

The file fetchUser_data.php executes a mysql statement and retrieves, but before that it goes to this statement:

if( isset($_GET["id"]) )
{

and never goes to into the if condition, why is that?!??

Answer 1

You already answered your own question: the if statement in your PHP code is not being triggered, which automatically implies that $_GET['id'] is not set.

The jQuery documentation on .load() is quite clear on this:

The POST method is used if data is provided as an object; otherwise,
GET is assumed.

Since you are supplying id as an object, it will be available in $_POST.