老张小站

适用情况：若已启用触屏版伪静态（自行修改模板实现），当用户切换到电脑版，再后退到触屏版时，由于网址中已不再带有 mobile=2 参数，点击任意链接仍然会进入电脑版，必须通过电脑版上的“手机版”链接切回。为了避免用户进入电脑版后不懂如何回到触屏版，我们可以在用户选择切换电脑版时，加入一个确认页面。

1、将以下代码保存为 redirect.php 并上传到根目录。

<?php
define('CURSCRIPT', 'redirect');
require './source/class/class_core.php';//引入系统核心文件
$discuz = & discuz_core::instance();//以下代码为创建及初始化对象
$discuz->init();

$n = $_GET['n'];
$n = trim($n); 
$n = strip_tags($n,""); //清除HTML如<br />等代码
$n = ereg_replace("\t","",$n); //去掉制表符号
$n = ereg_replace("\r\n","",$n); //去掉回车换行符号
$n = ereg_replace("\r","",$n); //去掉回车
$n = ereg_replace("\n","",$n); //去掉换行
$n = ereg_replace(" ","",$n); //去掉空格
$n = ereg_replace("'","",$n); //去掉单引号
$to = $_GET['to'];
$to = trim($to); 
$to = strip_tags($to,""); //清除HTML如<br />等代码
$to = ereg_replace("\t","",$to); //去掉制表符号
$to = ereg_replace("\r\n","",$to); //去掉回车换行符号
$to = ereg_replace("\r","",$to); //去掉回车
$to = ereg_replace("\n","",$to); //去掉换行
$to = ereg_replace(" ","",$to); //去掉空格
$to = ereg_replace("'","",$to); //去掉单引号

if($_GET['tid']) {
header("HTTP/1.1 301 Moved Permanently");
header("location: thread-".$_GET['tid']."-1-1.html");
exit;
} elseif($_GET['ptid']) {
if(preg_match("/(Bot|Crawl|Spider|slurp|sohu-search|lycos|robozilla)/i", $_SERVER['HTTP_USER_AGENT'])) {
  $url = 'thread-'.$_GET['ptid'].'-1-1.html';
} else {
  $url = 'forum.php?mod=redirect&goto=findpost&ptid='.$_GET['ptid'].'&pid='.$_GET['pid'];
}
header("HTTP/1.1 301 Moved Permanently");
header("location: $url");
exit;
} elseif($n == 'switcher' && $to) {
$navtitle = '版本切换';
include template('common/redirect');//调用单页模版文件
exit;
} else {
header('HTTP/1.1 404 Not Found');
header('status: 404 Not Found');
echo '参数错误。<a href="/">返回首页</a>';
exit;
}
?>