/**
* Enable caching
*
* @param string $folder The cache folder or NULL to use a system temporary directory (default: NULL)
* @param int $timeout The caching timeout in seconds or NULL to use the previous value or the default (3600) (default: NULL)
*/
public static function EnableCache($folder = null, $timeout = null)
{
if (is_null($folder)) {
if (self::IsCacheFolderWriteAble('./cache')) {
$folder = './cache';
} else {
if (self::IsCacheFolderWriteAble(dirname(__FILE__) . '/cache')) {
$folder = dirname(__FILE__) . '/cache';
} else {
if (self::IsCacheFolderWriteAble(sys_get_temp_dir())) {
$folder = sys_get_temp_dir();
} else {
self::Debug('Could not find a cache folder');
}
}
}
}
if (is_null($timeout)) {
$timeout = self::$CacheTime != 0 ? self::$CacheTime : 3600;
}
self::Debug('Enable cache in folder "' . (is_null($folder) ? '(none)' : $folder) . '" with timeout ' . $timeout . ' seconds');
self::$CacheFolder = $folder;
self::$CacheTime = $timeout;
}
