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  • wordpress速度优化-redis终极加速-比任何缓存插件都快的方法

    本站依米资源网https://www.eeimi.com搭建在一个比较差的服务器上,所以速度可想而知是非常的不怎么快。但是速度就是流量,3秒内打不开基本就没啥人原因等了。

    所以,我还是想尽最大努力再救一下。

    前期摸索

    部署好网站之后我就开启了mencached缓存,开启后速度也还是不尽如人意。

    然后又尝试使用了大家最常用的缓存插件,如W3 Total Cache插件、WP super cache插件,但是由于服务器基础不好,这些插件的作用也不怎么明显。

    再后来又安装了redis缓存,宝塔面板下非常容易,就是先安装redis服务器,再到PHP中安装redis扩展。网上一大堆教程我就不重复了,不会的去度娘一下。

    到这里大家的网站应该可以比较快了,3秒以内打开已经非常有可能了。

    但是我的还是速度很慢,基本都要3秒。

    终极加速(毫秒级)

    后来,各种搜索,终于发现了一种终极加速方法,也是依米资源网目前在用的,可以实现0.00X秒速度。

    这种方法也是redis缓存,但是使用的客户端和前面的不一样,是使用Predis.php作为客户端,前端使用了Jim Westergren开发的index-with-redis.php

    具体使用方法:

    1.下载Predis.php,将该php文件放到网站根目录。

    Predis.php下载https://eeimicom.lanzouw.com/i6azruht21e

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

    <?php
    
    /*
        author: jeedo aquino
        file: wp-index-redis.php
        credit: jim westergren
        updated: 2012-10-23
    
        this is a redis caching system for wordpress inspired by jim westergren.
        see more here: www.jimwestergren.com/wordpress-with-redis-as-a-frontend-cache/
        some caching mechanics are different from jim's script which is summarized below:
    
        - cached pages do not expire not unless explicitly deleted or reset
        - appending a ?c=y to a url deletes the entire cache of the domain, only works when you are logged in
        - appending a ?r=y to a url deletes the cache of that url
        - script still works even if allow_fopen is disabled
        - submitting a comment deletes the cache of that page
        - refreshing (f5) a page deletes the cache of that page
        - includes a debug mode, stats are displayed at the bottom most part after 
    
        for setup and configuration see more here:
    
        www.jeedo.net/lightning-fast-wordpress-with-nginx-redis/
    
        use this script at your own risk. i currently use this albeit a slightly modified version
        to display a redis badge whenever a cache is displayed.
    
    */
    
    // change vars here
    $cf = 0;                // set to 1 if you are using cloudflare
    $debug = 1;             // set to 1 if you wish to see execution time and cache actions
    
    $start = microtime();   // start timing page exec
    
    // if cloudflare is enabled
    if ($cf) {
        if (isset($_SERVER['HTTP_CF_CONNECTING_IP'])) {
            $_SERVER['REMOTE_ADDR'] = $_SERVER['HTTP_CF_CONNECTING_IP'];
        }
    }
    
    // from wp
    define('WP_USE_THEMES', true);
    
    // init predis
    include("predis.php");
    $redis = new Predis\Client('');
    
    // init vars
    $domain = $_SERVER['HTTP_HOST'];
    $url = "https://".$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
    $url = str_replace('?r=y', '', $url);
    $url = str_replace('?c=y', '', $url);
    $dkey = md5($domain);
    $ukey = md5($url);
    
    // check if page isn't a comment submission
    (($_SERVER['HTTP_CACHE_CONTROL'] == 'max-age=0') ? $submit = 1 : $submit = 0);
    
    // check if logged in to wp
    $cookie = var_export($_COOKIE, true);
    $loggedin = preg_match("/wordpress_logged_in/", $cookie);
    
    // check if a cache of the page exists
    if ($redis->hexists($dkey, $ukey) && !$loggedin && !$submit) {
    
        echo $redis->hget($dkey, $ukey);
        if (!$debug) exit(0);
        $msg = 'this is a cache';
    
    // if a comment was submitted or clear page cache request was made delete cache of page
    } else if ($submit || substr($_SERVER['REQUEST_URI'], -4) == '?r=y') {
    
        require('./wp-blog-header.php');
        $redis->hdel($dkey, $ukey);
        $msg = 'cache of page deleted';
    
    // delete entire cache, works only if logged in
    } else if ($loggedin && substr($_SERVER['REQUEST_URI'], -4) == '?c=y') {
    
        require('./wp-blog-header.php');
        if ($redis->exists($dkey)) {
            $redis->del($dkey);
            $msg = 'domain cache flushed';
        } else {
            $msg = 'no cache to flush';
        }
    
    // if logged in don't cache anything
    } else if ($loggedin) {
    
        require('./wp-blog-header.php');
        $msg = 'not cached';
    
    // cache the page
    } else {
    
        // turn on output buffering
        ob_start();
    
        require('./wp-blog-header.php');
    
        // get contents of output buffer
        $html = ob_get_contents();
    
        // clean output buffer
        ob_end_clean();
        echo $html;
    
        // store html contents to redis cache
        $redis->hset($dkey, $ukey, $html);
        $msg = 'cache is set';
    }
    
    $end = microtime(); // get end execution time
    
    // show messages if debug is enabled
    if ($debug) {
        echo $msg.': ';
        echo t_exec($start, $end);
    }
    
    // time diff
    function t_exec($start, $end) {
        $t = (getmicrotime($end) - getmicrotime($start));
        return round($t,5);
    }
    
    // get time
    function getmicrotime($t) {
        list($usec, $sec) = explode(" ",$t);
        return ((float)$usec + (float)$sec);
    }
    
    ?>
    

    或者直接下载index-with-redis.php

    3.如果你的服务器环境是Apache,则在 .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 则重命名index-with-redis.php的 index.php (原index.php请备份)。

    接下来在访问你的网站,你会发现已经飞起来了。

    后话

    前文的index-with-redis.php经过优化之后的,推荐优先使用,但是有些情况下可能会出现错误现象,比如我的使用上面的index-with-redis.php后内页都很正常,但是首页经常无法加载样式。

    所以我就使用了index-with-redis.php最原始版本,目前情况待观测。

    原始版本index-with-redis.php代码如下

    <?php
    
    // Change these two variables:
    
    $seconds_of_caching = 60*60*24*7; // 7 days.
    
    $ip_of_this_website = '1.1.1.1'; // 此处更换为你的服务器ip
    
    /*
    
    - 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:
    
    if (isset($_SERVER['HTTP_CF_CONNECTING_IP'])) {
    
    $_SERVER['REMOTE_ADDR'] = $_SERVER['HTTP_CF_CONNECTING_IP'];
    
    }
    
     
    
    // 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 Predis\Client('');
    
     
    
    // few variables:
    
    $current_page_url = "https://".$_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)) {
    
    require('./wp-blog-header.php');
    
    $redis->del($redis_key);
    
     
    
    // 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 $html_of_current_page;
    
    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 {
    
    require('./wp-blog-header.php');
    
    }
    
     
    
    // 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. -->";
    
    }
    
    ?>
    

     

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