if (!isset($_SERVER['HTTP_REFERER']) &&  !strpos($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'] ) 
    ||  !strpos($_SERVER['HTTP_REFERER'], 'link.php' )) {
    header('HTTP/1.0 403 Forbidden');
    header("Location: ../index.php");
    die();
}

require_once('links.php');

$id = $_POST['id'];

removerlink($id);//Generated by Ampare PHP Encoder. For more security please use php protect before encode the php program