首先将你的index.php文件做个备份,建议更名为index.php.bak(实际上这个文件用处不太大,直接删除都行,不信你自己看内容)
然后将下面的内容,保存为index.php,并且上传到根目录:
<?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 </html> 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']; $url = "http://".$_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 "<div id=\"redis_powered\"><div>$msg : ".t_exec($start, $end)." sec</div></div>"; } // time diff function t_exec($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); } ?>
还需要一个文件predis.php,已经打包好了,直接下载即可(猜猜下载地址在哪)
最后在你主题的style.css末尾添加如下代码:
#redis_powered{margin:0px auto;background:url(https://birdteam.net/wp-content/themes/begin/img/redis.png) 10px no-repeat #fff;border:1px solid #D7D8DF;padding:10px;width:320px;} #redis_powered div{width:300px;text-align:right;font:9px/10px arial,sans-serif;color:#000;}