php: check if js and cookie enabled

gistfile1.txt

<?php
ob_start();/* header buffer */
session_start();

### Make cookies if they don't exist #######################
if(!$_SESSION['exists']){
    $_SESSION['exists']= 'off';  
    setcookie("exits", "data");
}
### Test for $_SESSION cookies being enabled  ##############
if($_SESSION['exists']== 'off'){
    if($_GET['js']){
   if (!$_COOKIE["exits"]){
          $err= $err. "Cookie: Error<br>"; 
        }
    }
### Process $_GET ##########################################    
    if($_GET['js']== "on"){/*get sent with js*/
        $jsOn= "on";  
    }elseif($_GET['js']== "off"){/*get sent with meta header*/
      $err= $err. "Javascript: Error<br>";   
    }else{        
        ?>
        <script language="JavaScript">
        location.href = location.href+'?js='+'on';/*send get with js*/
        </script>
        <noscript>
        <!/* send get with header*/>
        <meta http-equiv="refresh" content="0;url=<?php print $PHP_SELF. '?js=off' ?>"/>    
        </noscript>
        <?php
    }    
}else{
    $err= $err. "Session Cookie: Error<br>";/*session cookie error*/   
}
if($_SESSION['exists'] && $_COOKIE["exits"] && $jsOn== "on"){
  $_SESSION['exists']= "on";
}
### Add program code ########################################
if($_SESSION['exists']== 'on'){
    print"<h3>Add Program Script or Includes<br><br>";
    print"Session Cookies: Enabled<br>";
    print"Javascript: Enabled<br>";
    print"Cookies: Enabled<br></h3><br>";
}else{
### Add error code ###########################################
    print"<h3>Add Error Script or Includes<br><br>";
    print "For the Website to function properly.<br>";
    print "Javascript and Cookies should be enabled.<br><br>";
     print "$err</h3><br>";
}

while (@ob_end_flush());
?>