una/inc/classes/BxDolCacheFileHtml.php

<?php
/**
 * @package     Dolphin Core
 * @copyright   Copyright (c) BoonEx Pty Limited - http://www.boonex.com/
 * @license     CC-BY - http://creativecommons.org/licenses/by/3.0/
 */
defined('BX_DOL') or die('hack attempt');

bx_import('BxDolCacheFile');

class BxDolCacheFileHtml extends BxDolCacheFile {

    /**
     * constructor
     */
    function BxDolCacheFileHtml() {
        parent::BxDolCacheFile();
    }

    /**
     * Get all data from the cache file.
     *
     * @param string $sKey - file name
     * @param int $iTTL - time to live
     * @return the data is got from cache.
     */
    function getData($sKey, $iTTL = false) {

        if(!file_exists($this->sPath . $sKey))
            return null;

        if ($iTTL > 0 && $this->_removeFileIfTtlExpired ($this->sPath . $sKey, $iTTL))
            return null;

        return file_get_contents($this->sPath . $sKey);
    }

    /**
     * Get full path to cache file
     */
    function getDataFilePath($sKey, $iTTL = false) {
        if (!file_exists($this->sPath . $sKey))
            return null;

        if ($iTTL > 0 && $this->_removeFileIfTtlExpired ($this->sPath . $sKey, $iTTL))
            return null;

        return $this->sPath . $sKey;
    }

    /**
     * Save all data in cache file.
     *
     * @param string $sKey - file name
     * @param mixed $mixedData - the data to be cached in the file
     * @param int $iTTL - time to live
     * @return boolean result of operation.
     */
    function setData($sKey, $mixedData, $iTTL = false) {
        if(file_exists($this->sPath . $sKey) && !is_writable($this->sPath . $sKey))
           return false;

        if(!($rHandler = fopen($this->sPath . $sKey, 'w')))
           return false;

        fwrite($rHandler, $mixedData);
        fclose($rHandler);
        @chmod($this->sPath . $sKey, 0666);

        return true;
    }
}