Quality Center OTA via PHP

gistfile1.php

<?php
// Found this on the web

// Requirements: PHP + COM + Win32 (duh)
// DISCLAIMER: Found this on the web. Have not tested this yet, but it would come in handy

$qcurl =$_GET["qcurl"];
$usr =$_GET["usr"];
$pwd =$_GET["pwd"];
$dmn =$_GET["dmn"];
$prj =$_GET["prj"]; 

$tdc = new COM("TDApiOle80.TDConnection") or die("Unable to instantiate Quality Center OTA API COM Object");
$tdc->InitConnectionEx($qcurl);
$tdc->Login($usr, $pwd);

If ($tdc->LoggedIn == 1)
 echo "
Connected";
Else
        echo "Check the Attributes";

$tdc->Connect($dmn,$prj);

If ($tdc->Connected == 1)
 echo "
Logged In : Domain - $dmn | Project :$prj ";

//$tsttMgr = $tdc->TestSetTreeManager; 


//Disconnect from the project
If ($tdc->Connected == 1)
{    $tdc->Disconnect();
 echo "
Disconnected";
 }
//Log off the server
If ($tdc->LoggedIn == 1)
    $tdc->Logout();

//Release the TDConnection object.
$tdc->ReleaseConnection();
echo "Released Connection.";

?>

The gist works. Great! Thanks!!
Now the question is, what call can I do with the connection?