Process::logMessage

public function logMessage($message = '', $addTimeStamp = true)
{
	if(!static::DEBUG_MODE || !mb_strlen($message))
		return;

	file_put_contents(
		$this->getLogFilePath(),
		($addTimeStamp ? $this->getTimeStampString().' ' : '').$message.PHP_EOL,
		FILE_APPEND
	);
}