/**
* Class ErrorLogger
*/
class ErrorLogger extends Logger
{
/**
* @param $message
* @return mixed|void
*/
protected function doLog($message)
{
echo "Sending to stderr: ", $message, " \n";
}
}
/**
* Class StdoutLogger
*/
class StdoutLogger extends Logger
{
/**
* @param $message
* @return mixed|void
*/
protected function doLog($message)
{
echo "Writing to stdout: ", $message, " \n";
}
}
$logger = new StdoutLogger();
$logger->setNext(new ErrorLogger())->setNext(new EmailLogger());
$logger->log('Something happened');
