$this->createDir();
        $this->errorMessage = null;
        set_error_handler(array($this, 'customErrorHandler'));
        $this->stream = fopen($this->url, 'a');
        if ($this->filePermission !== null) {
            @chmod($this->url, $this->filePermission);
        }
        restore_error_handler();
        if (!is_resource($this->stream)) {
            $this->stream = null;
            throw new UnexpectedValueException(sprintf('The stream or file "%s" could not be opened: '.$this->errorMessage, $this->url));
        }
    }

    if ($this->useLocking) {
        // ignoring errors here, there's not much we can do about them
        flock($this->stream, LOCK_EX);
    }

    $this->streamWrite($this->stream, $record);

    if ($this->useLocking) {
        flock($this->stream, LOCK_UN);
    }
}