安装Redis前端缓存的PHP脚本

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1、Redis前端缓存的PHP脚本来自：http://www.shenbogame.com.com/wordpress-with-redis-as-a-frontend-cache/
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 = 1;// set to 1 if you are using cloudflare $debug = 0;// set to 1 if you wish to see execution time and cache actions $display_powered_by_redis = 1; // set to 1 if you want to display a powered by redis message with execution time, see below $start = microtime(); // start timing page exec // if cloudflare is enabled if ($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 (isset($_SERVER['HTTP_CACHE_CONTROL']) && $_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 && !$submit && !strpos($url, '/feed/')) { echo $redis->hget($dkey, $ukey); $cached = 1; $msg = 'this is a cache'; // if a comment was submitted or clear page cache request was made delete cache of page } else if ($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 to cache only if the page exist and is not a search result. if (!is_404() && !is_search()) { // 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, $end); } if ($cached && $display_powered_by_redis) { // You should move this CSS to your CSS file and change the: float:right;margin:20px 0; echo ""; echo "Page generated in
".t_exec($start, $end)." sec"; } // time diff function t_exec($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); } ?>
2、 你也可以直接点击备用下载：index-with-redis.php下载地址。 Github项目：https://gist.github.com/JimWestergren/3053250#file-index-with-redis-php
3、 如果你正在使用cloudflare，请设置cf = 1; ，如果你想在页面上看到脚本执行时间和缓存加载时间，请设置$debug = 1; display_powered_by_redis = 1表示显示powered_by信息。

4、将index-with-redis.php上传到Wordpress的根目录，如果你使用的是nginx，重命令原来的index.php为任意其它名字，把index-with-redis.php重命名为index.php。

5、如果你使用的是Apache，则需要把.htaccess中出现的index.php替换成index-with-redis.php。

6、所有的操作完成后，你就可以刷新一下Wordpress页面，查看Redis缓存效果了。
7、实际使用过程中发现以上代码会出现Wordpress首页和分类没有及时缓存，这里再给出优化版本，出自http://www.88shenbogame.com/lightning-fast-wordpress-with-nginx-redis/。
8、功能差不多，主要有：登录时页面不缓存、除非删除或者重置否则不删除缓存页面、登录时在任意URL后加上?c=y可以删除整个网站缓存、在任意URL后面加上?c=y可以清除此URL缓存、allow_fopen被禁止也可以正常运行、发表评论时删除该页面缓存。
9、index-with-redis.php优化版本的源码是：
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); } ?>

以上就介绍了 安装Redis前端缓存的PHP脚本，包括了方面的内容，希望对PHP教程有兴趣的朋友有所帮助。

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