PHP Connection String

Using below said code to connect with SBO with noluck, please help..

<?php

echo "SBO PHP TEST<br>";

$vCmp=new COM(SAPbobsCOM.company) or die ("No connection");

$vCmp->server = "(local)";

$vCmp->CompanyDB = "SBODemoIN";

$vCmp->username = "manager";

$vCmp->password = "1234";

$lRetCode = $vCmp->Connect;

echo $vCmp->CompanyName;

echo '<br>';

?>

This code is throwing following error:-

SBO PHP TEST

Fatal error: Class 'COM' not found in C:\inetpub\wwwroot\PHP\SAP\SBOtest.PHP on line 3