最新解决Discuz！X3.4以下版本前台打开卡慢、后台登陆卡死或504错误等问题

　　只针对Discuz!X3.4以下的版本前台打开卡慢、后台登陆卡死或504错误的问题。

　　形成原因：discuz的补丁升级和版本检查验证已经关闭。而x3.4以下仍然在验证和检查导致链接超时，引起后台打不开。解决办法有两个。

解决方法一，升级到x3.4，x3.4版本已经移除了相关代码。

解决方法二，修改代码：
后台修改，文件source/admincp/admincp_main.php，删除以下代码大概37-60
if($_G['uid'] && $_G['member']['allowadmincp'] == 1 && ($_G['setting']['showpatchnotice'] == 1 || !isset($_G['cookie']['checkpatch']))) {
$discuz_patch = new discuz_patch();
if($_G['setting']['showpatchnotice'] == 1) {
$notice = $discuz_patch->fetch_patch_notice();
if($notice['data']) {
$shownotice = '

';
}
}
if(!isset($_G['cookie']['checkpatch'])) {
$discuz_patch->check_patch();
}
}
if($_G['uid'] && $_G['member']['allowadmincp'] == 1 && !$shownotice && $_G['setting']['upgrade']) {
$shownotice = ' ';
}
if($_G['uid'] && $_G['member']['allowadmincp'] == 1 && !isset($_G['cookie']['checkupgrade'])) {
$discuz_upgrade = new discuz_upgrade();
if($discuz_upgrade->check_upgrade()) {
if(empty($shownotice)) {
$shownotice = ' ';
}
}
dsetcookie('checkupgrade', 1, 7200);
}

前台修改，打开文件source\module\misc\misc_patch.php 将内容替换。

<?php

/**

• Discuz! (C)2001-2099 Comsenz Inc.
• This is NOT a freeware, use is subject to license terms
  *
• $Id: misc_patch.php 33690 2013-08-02 09:07:22Z nemohou $
  */

if(!defined('IN_DISCUZ')) {
exit('Access Denied');
}

if($_GET['action'] == 'checkpatch') {

header('Content-Type: text/javascript');
exit;

} elseif($_GET['action'] == 'patchnotice') {
include template('common/header_ajax');
include template('common/footer_ajax');
exit;
} elseif($_GET['action'] == 'pluginnotice') {
include template('common/header_ajax');
include template('common/footer_ajax');
exit;
} elseif($_GET['action'] == 'ipnotice') {
require_once libfile('function/misc');
include template('common/header_ajax');
if($_G['cookie']['lip'] && $_G['cookie']['lip'] != ',' && $_G['uid'] && $_G['setting']['disableipnotice'] != 1) {
$status = C::t('common_member_status')->fetch($_G['uid']);
$lip = explode(',', $_G['cookie']['lip']);
$lastipConvert = convertip($lip[0]);
$lastipDate = dgmdate($lip[1]);
$nowipConvert = convertip($status['lastip']);

    $lastipConvert = process_ipnotice($lastipConvert);
    $nowipConvert = process_ipnotice($nowipConvert);

    if($lastipConvert != $nowipConvert && stripos($lastipConvert, $nowipConvert) == false && stripos($nowipConvert, $lastipConvert) == false) {
        $lang = lang('forum/misc');
        include template('common/ipnotice');
    }
}
include template('common/footer_ajax');
exit;

}
?>

修改方法就这些，大家可以测试一下。

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