我下面提出的解决方案是在Redis中缓存所有输出的HTML 内容而无需再让WordPress重复执行页面脚本。这里使用Redis代替Varnish设置简单,而且可能更快。


如果你使用的是 Debian 或者衍生的操作系统可使用如下命令安装 Redis:

apt-get install redis-server

或者阅读 安装指南

2、使用 Predis 作为 Redis 的 PHP 客户端 

你需要一个客户端开发包以便 PHP 可以连接到 Redis 服务上。
这里我们推荐 Predis, 上传 predis.php 到 WordPress 的根目录。


步骤1:在WordPress 的根目录创建新文件 index-with-redis.php ,内容如下:

// Change these two variables:
seconds_of_caching = 60*60*24*7; // 7 days.ip_of_this_website = '';
- This file is written by Jim Westergren, copyright all rights reserved.
- See more here: www.jimwestergren.com/wordpress-with-redis-as-a-frontend-cache/
- The code is free for everyone to use how they want but please mention my name and link to my article when writing about this.
- Change ip_of_this_website to the IP of your website above.
- Add ?refresh=yes to the end of a URL to refresh it's cache
- You can also enter the redis client via the command prompt with the command "redis-cli" and then remove all cache with the command "flushdb".
// Very necessary if you use Cloudfare:
// This is from WordPress:
define('WP_USE_THEMES', true);
// Start the timer:
function getmicrotime(t) {
list(usec, sec) = explode(" ",t);
return ((float)usec + (float)sec);
start = microtime();
// Initiate redis and the PHP client for redis:
include("predis.php");redis = new PredisClient('');
// few variables:
current_page_url = "http://"._SERVER['HTTP_HOST']._SERVER['REQUEST_URI'];current_page_url = str_replace('?refresh=yes', '', current_page_url);redis_key = md5(current_page_url);
// This first case is either manual refresh cache by adding ?refresh=yes after the URL or somebody posting a comment
if (isset(_GET['refresh']) || substr(_SERVER['REQUEST_URI'], -12) == '?refresh=yes' || (_SERVER['HTTP_REFERER'] == current_page_url &&_SERVER['REQUEST_URI'] != '/' && _SERVER['REMOTE_ADDR'] !=ip_of_this_website)) {
// Second case: cache exist in redis, let's display it
} else if (redis->exists(redis_key)) {
html_of_current_page =redis->get(redis_key);
echo "<!-- This is cache -->";
// third: a normal visitor without cache. And do not cache a preview page from the wp-admin:
} else if (_SERVER['REMOTE_ADDR'] !=ip_of_this_website && strstr(current_page_url, 'preview=true') == false) {
require('./wp-blog-header.php');html_of_current_page = file_get_contents(current_page_url);redis->setex(redis_key,seconds_of_caching, html_of_current_page);
echo "<!-- Cache has been set -->";
// last case: the normal WordPress. Should only be called with file_get_contents:
} else {
// Let's display some page generation time (note: CloudFlare may strip out comments):end = microtime();
t2 = (getmicrotime(end) - getmicrotime(start));
if (_SERVER['REMOTE_ADDR'] != ip_of_this_website) {
echo "<!-- Cache system by Jim Westergren. Page generated in ".round(t2,5)." seconds. -->";

或者直接下载 index-with-redis.php 

步骤2:将上述代码中的 IP 地址替换成你网站的 IP 地址 

步骤3:在.htaccess 中将所有出现 index.php 的地方改为 index-with-redis.php ,如果你使用的是 Nginx 则修改 nginx.conf 中的 index.php 为 index-with-redis.php(并重载 Nginx : killall -s HUP nginx)。


1.没有Redis 的情况下,平均首页执行1.614 秒,文章页0.174 秒(无任何缓存插件) 。

2.使用Redis 的情况下,平均页面执行时间0.00256秒


我的环境是Nginx + PHP-FPM + APC + Cloudflare + Redis. 安装在一个 nano VPS 中,无缓存插件。

访问 wp-admin
要访问 wp-admin 必须使用 /wp-admin/index.php 代替原来的 /wp-admin/。