Class for caching Texy! results

TexyCache.php

<?php
/**
 * TexyCache - class for caching Texy! results
 * -------------------------------------------
 * 
 * Using Texy! the great web text markup-language processor by David Grudl (http://davidgrudl.com)
 * For more information please visit http://texy.info
 * 
 * @author Ondrej Slamecka, 2010
 * @license New BSD license (see http://texy.info/en/licence)
 */

class TexyCache /* extends \Nette\Object */
{

    private $texy;
    private $path;

    public function __construct($path = '')
    {
        $this->texy = new \Texy;
        $this->path = $path;

        if (!is_dir($this->path)) {
            mkdir($this->path, 0777);
        }
    }

    public function getTexy()
    {
        return $this->texy;
    }

    public function process($text)
    {
        $cachefilepath = $this->path . '/_' . md5($text) . '.tcf';

        if (is_file($cachefilepath)) {

            $cache = file_get_contents($cachefilepath);
            $cache = @unserialize($cache);
            return $cache[0];
        } else {

            $text = $this->texy->process($text);
            // Folder must exist!
            fwrite(fopen($cachefilepath, 'w'), serialize(array(0 => $text)));

            return $text;
        }
    }

    public function flushCache()
    {
        foreach (scandir($this->path) as $tcf) {
            if ($tcf != '.' && $tcf != '..') {
                unlink($this->path . '/' . $tcf);
            }
        }
    }

}