Monolog - Structured Logging

1use Monolog\Logger;
2use Monolog\Handler\StreamHandler;
3use Monolog\Handler\RotatingFileHandler;
4use Monolog\Formatter\JsonFormatter;
5 
6class LoggerFactory
7{
8    public function createLogger(string $channel): Logger
9    {
10        $logger = new Logger($channel);
11 
12        $streamHandler = new StreamHandler(
13            'php://stdout',
14            Logger::DEBUG
15        );
16        $streamHandler->setFormatter(new JsonFormatter());
17        $logger->pushHandler($streamHandler);
18 
19        $fileHandler = new RotatingFileHandler(
20            '/var/log/app.log',
21            7,
22            Logger::WARNING
23        );
24        $logger->pushHandler($fileHandler);
25 
26        return $logger;
27    }
28 
29    public function logWithContext(Logger $logger, array $data): void
30    {
31        $logger->info('Processing started', [
32            'user_id' => $data['user_id'],
33            'action' => $data['action'],
34            'timestamp' => time()
35        ]);
36    }
37}