cache.php

<?php
class PHPCache {
	protected $path = null;
	protected $durationInSeconds = null;
	protected $filenamePrefix = null;
	protected $disableCacheForAdmin = false;
	
	function __construct ( $path, $filenamePrefix='phpcache-', $durationInSeconds = 60) {
		$this->path = $path;
		$this->filenamePrefix = $filenamePrefix;
		$this->durationInSeconds = $durationInSeconds;
	}
	
	function getCacheFilename( $id ){
		return 	$this->path . $this->filenamePrefix . md5($id) . '.cache';
	}
	
	function get( $id, $durationInSeconds=false) {
		
		if(!$durationInSeconds){
			$durationInSeconds = $this->durationInSeconds;	
		}
		
		$file = $this->getCacheFilename($id);
		if (!$this->disableCacheForAdmin 
				&& file_exists($file) 
					&& time() - filemtime($file) < $durationInSeconds) {
			return unserialize( file_get_contents($file) );			
		} else {
			return null;
		}
	}
	
	function set( $id, $obj) {
		$file = $this->getCacheFilename($id);
		file_put_contents($file, serialize($obj));
	}
	
	function disableCacheForAdmin($aUserIsAdminBoolean){
		$this->disableCacheForAdmin = $aUserIsAdminBoolean;
	}
}

/* example initiation */
$cacheDirectory = 'path-to-your-cache-directory/';
$cache = new PHPCache($cacheDirectory);
$cache->disableCacheForAdmin(checkIfUserIsAdmin());

/* example usage */
$cacheKey = __FILE__;
$cacheDurationInSeconds = 60;
$cachedView = $cache->get($cacheKey, $cacheDurationInSeconds);

if (is_null($cachedView)){
	ob_start();
	
	echo "echo out your view here and it will be cached.";
	
	$cachedView = ob_get_contents();
	ob_clean();
	$cache->set(__FILE__, $cachedView);
}

echo $cachedView;