(PHP 5)
streamWrapper::stream_lock — Advisory file locking
This method is called in response to flock(), when file_put_contents() (when flags contains LOCK_EX), stream_set_blocking() and when closing the stream (LOCK_UN).
operation is one of the following:
Gibt bei Erfolg TRUE zurück. Im Fehlerfall wird FALSE zurückgegeben.
Emits E_WARNING if call to this method fails (i.e. not implemented).