- $keys = array('nickname', 'hostname', 'pathname');
- foreach ($keys as $k) {
- $ck = self::cacheKey($k, $this->$k);
- self::$cache->delete($ck);
+ if (self::$cache) {
+ $keys = array('nickname', 'hostname', 'pathname');
+ foreach ($keys as $k) {
+ $ck = self::cacheKey($k, $this->$k);
+ self::$cache->delete($ck);
+ }