Check connection, help!

1

i wanna use php code to check connection, my code is as below, but it is not working can u guys point out the error for me !!! thx…

<?php
function is_connected();

function is_connected()
{
    
    $connected = @fsockopen("www.google.com");
    if ($connected){
        $is_conn = true;
        fclose($connected);
    }else{
        $is_conn = false;
    }
    return $is_conn;
   
}
?>