// use this to call the code

<?php chkServer("earth.worxtech.net", "80"); ?>



// function php code

<?php
function chkServer($host, $port)
{ 
   $hostip = @gethostbyname($host);
  
   if ($hostip == $host)
   {
       echo '<img src="images/red_off.gif" width="20" height="20"/>';
   }
   else
   {
       if (!$x = @fsockopen($hostip, $port, $errno, $errstr, 5))
       {
           echo '<img src="images/red_on.gif" width="20" height="20"/>';
       }
       else
       {
           echo '<img src="images/green_on.gif" width="20" height="20"/>';
           if ($x)
           {
               @fclose($x);
           }
       } 
   }
}
?>