LS cache WIP

index-with-cache.php

<?php

  $Phpr_InitOnly = true;

	require_once('boot.php');

	$cache = Core_CacheBase::create();

	// change vars here
	$debug = 1;     // set to 1 if you wish to see execution time and cache actions
	$display_stats = 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 (isset($_SERVER['HTTP_CF_CONNECTING_IP']))
		$_SERVER['REMOTE_ADDR'] = $_SERVER['HTTP_CF_CONNECTING_IP'];
	 
	// 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("/eCommerce/", $cookie);

	$cached = 0;

	// check if a cache of the page exists
	if (!$loggedin && !$submit && $cache->get($dkey . $ukey)) {
	 
		echo $cache->get($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') {
		$cache->del($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') {
		Phpr::$response->open( Phpr::$request->getCurrentUri(true) );

		if ($redis->exists($dkey)) {
			$redis->del($dkey);
			$msg = 'domain cache flushed';
		} 
		else {
			$msg = 'no cache to flush';
		}
	} 
	else if ($loggedin) { // if logged in don't cache anything
		$Phpr_InitOnly = false;

		require_once('boot.php');

		$msg = 'not cached';
	} 
	else { // cache the page
	 
		// turn on output buffering
		ob_start();

		Phpr::$response->open( Phpr::$request->getCurrentUri(true) );
	 
		// get contents of output buffer
		$html = ob_get_contents();
	 
		// clean output buffer
		ob_end_clean();
		//echo $html;
	 
		// store html contents to redis cache
		$cache->set($dkey . $ukey, $html, 5 * 60); // set to expire in 5 mins

		$msg = 'cache is set';
	}
	 
	$end = microtime(); // get end execution time
	 
	// show messages if debug is enabled
	if ($debug) {
		echo "DEBUG ";
		echo $msg . ': ';
		echo t_exec($start, $end);
	}
	 
	if ($cached && $display_stats) {
		echo "<div>Page generated in<br/> ".t_exec($start, $end)." sec</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);
	}
 
?>