k0nsl's index.php for WordPress.

k0nsl-wordpress-index.php

<?php
 
/*
    Base code by Jim Westergren & Jeedo Aquino
    File: index.php
    Updated: 2013-10-22

    comment: this entire index needs to be rewritten from scratch - very ugly.
 
*/
 
// 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 = 0;  // 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'];
    }
}
/*
exec("pgrep redis-server", $output, $return);
if ($return == 1) {
    die("Something is wrong. Please contact <strong>k0nsl</strong> at <strong>i.am@k0nsl.org</strong>.");
}
*/
// from wp
define('WP_USE_THEMES', true);
 
// init predis
include("/server31/k0nsl.org/public_html/blog/predis.php");
$redis = new Predis\Client('');

//try {
//    $redis = new Predis\Client();
/*
    $redis = new Predis\Client(array(
        "scheme" => "tcp",
        "host" => "127.0.0.1",
        "port" => 6379));
*/
    //echo "Successfully connected to Redis";
//}
//catch (Predis\CommunicationException $exception) {
//    echo "something went wrong. k0nsl (i.am@k0nsl.org) has been notified!";
//    echo $exception->getMessage();
//}

// 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('/server31/k0nsl.org/public_html/blog/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('/server31/k0nsl.org/public_html/blog/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('/server31/k0nsl.org/public_html/blog/wp-blog-header.php');
    $msg = 'not cached';
 
// cache the page
} else {
 
    // turn on output buffering
    ob_start();
 
    require('/server31/k0nsl.org/public_html/blog/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 && $display_powered_by_redis) {
	// You should move this CSS to your CSS file and change the: float:right;margin:20px 0;
	echo "<style>#redis_powered{float:right;margin:20px 0;background:url(http://images.staticjw.com/jim/3959/redis.png) 10px no-repeat #fff;border:1px solid #D7D8DF;padding:10px;width:190px;}
	#redis_powered div{width:190px;text-align:right;font:10px/11px arial,sans-serif;color:#000;}</style>";
	echo "<a href=\"http://www.jimwestergren.com/wordpress-with-redis-as-a-frontend-cache/\" style=\"text-decoration:none;\"><div id=\"redis_powered\"><div>Page generated in<br/> ".t_exec($start, $end)." sec</div></div></a>";
}
 
// 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);
}

?>