php 登录之后，返回会员上一次访问的路径网址

在判断是否例如的程序地方：

<?phpheader ( 'Content-Type: text/html; charset=utf-8' );$referurl = $_SERVER['REQUEST_URI']; session_start ();$_SESSION ['referurl'] = $referurl;if ($_SESSION ['username'] == "") {echo "<script language='javascript'>alert('你没有登录，请登录后操作');location.href='login.php';</script>";}?>

在登录处理的地主：

if(!$_SESSION ['referurl']){echo "<script>location.href='ucenter.php';</script>";}else{echo "<script>location.href='".$_SESSION ['referurl']."';</script>";}