// Read the XML file for processing.
			$cache_filename = $this->cache_location . '/' . urlencode($this->rss_url) . '.spc';
			if ($this->caching && !$this->xml_dump && substr($this->rss_url, 0, 7) == 'http://' && file_exists($cache_filename)) {
				if ($fp = fopen($cache_filename, 'r')) {
					$data = '';
					while (!feof($fp)) {
						$data .= fread($fp, 2048);
					}
					fclose($fp);
					$mp_rss = unserialize($data);
					if (empty($mp_rss)) {
						$this->caching = false;
						return $this->init();
					} elseif (isset($mp_rss['feed_url'])) {
						$this->rss_url = $mp_rss['feed_url'];
						return $this->init();
					} else {
						$this->data = $mp_rss;
						return true;
					}
				} else {
					$this->caching = false;
					return $this->init();
				}