/**
* Retrieve cached data.
* @access public
* @param string $cacheID The unique ID of the retrieved data.
* @return mixed $result Returns a string containg the cached XML data, or FALSE if there is no cached data.
*/
public function getCachedData($cacheID)
{
switch ($this->dataStore) {
case "file":
$filename = $this->dataPath . "/" . $cacheID;
if (file_exists($filename)) {
if (time() - filemtime($filename) > $this->updateInterval) {
// Cache is out of date, remove the old file
self::triggerNotice("Cached file data for " . $cacheID . " is outdated.");
@unlink($filename);
} else {
// Return the cached XML as an array
$array = unserialize(file_get_contents($filename));
self::triggerNotice("Cached file data for " . $cacheID . " is valid.");
return $array;
}
}
break;
case "mysql":
$query = "SELECT cache_xml, UNIX_TIMESTAMP(cache_time) AS cache_time FROM `" . $this->mysqlTable . "` WHERE cache_id = '" . $cacheID . "'";
$result = mysql_query($query, $this->mysqlString) or self::triggerError("Unable to select cache from database");
if ($result && mysql_num_rows($result)) {
if (time() - mysql_result($result, 0, 'cache_time') > $this->updateInterval) {
$query = "DELETE FROM `" . $this->mysqlTable . "` WHERE cache_id = '" . $cacheID . "'";
mysql_query($query, $this->mysqlString);
self::triggerNotice("Cached mysql data for " . $cacheID . " is outdated.");
} else {
// Return the cached XML as an array
self::triggerNotice("Cached mysql data for " . $cacheID . " is valid.");
return parent::convertXmlToArray(mysql_result($result, 0, 'cache_xml'));
}
}
break;
}
}
