so i also should put this lines in the command file? Or assuming that the constants already exists? It's a class file, we shouldn't find code outside of the class.
```
$phpbb_root_path = __DIR__ . '/../../../';
$phpEx = substr(strrchr(__FILE__, '.'), 1);
```
About the utility, if you want to manage your board form the cli you should be able to purge the cache from the command line utility instead of running manually a command like `rm -rf cache/*`