laravel 5.2 custom log file for different tasks

Question

Can we create a custom log file for different purposes in laravel 5.2 like for order related log entries that should be in order.log and for payment related stuff the entry shou

Answer 1

To expand on ShQ's answer:

One issue I noticed is that the log will be appended with [] [], which are the empty array values for $context and $extra within LineFormatter.format();

ie, vendor/monolog/monolog/src/Monolog/Formatter/LineFormatter.php

There are two ways around this, either provide a format which does not include extra or context to the constructor of LineFormatter, or provide the 4th argument $ignoreEmptyContextAndExtra = true.

All files within ShQ's answer remain the same but ChannelStreamHandler must change.

ChannelStreamHandler:

channel = $channel;

        $formatter = new LineFormatter(null, null, false, true);
        $this->setFormatter($formatter);

        parent::__construct($stream, $level, $bubble);
    }

    /**
     * When to handle the log record.
     *
     * @param array $record
     * @return bool
     */
    public function isHandling(array $record)
    {
        //Handle if Level high enough to be handled (default mechanism)
        //AND CHANNELS MATCHING!
        if (isset($record['channel'])) {
            return ($record['level'] >= $this->level && $record['channel'] == $this->channel);
        } else {
            return ($record['level'] >= $this->level);
        }
    }

}

The important change is to provide 4th param of true, which is $ignoreEmptyContextAndExtra. This param, tells LineFormatter to ignore either context of extra arrays if empty:

$formatter = new LineFormatter(null, null, false, true);
$this->setFormatter($formatter);

You must be sure to also ensure your running monolog 1.22 because it includes a bug fix regarding ignoreEmptyContextAndExtra.

I also added an override for info() to the ChannelWritter class:

public function info($channel, $message, array $context = [])
{
    $level = array_flip($this->levels)[$this->channels[$channel]['level']];
    $this->writeLog($channel, $level, $message, $context);
}

Additionally, I wasn't happy with the "lazy load logger" in ShQ's solution so modified to use the service provider/IoC

Replace ChannelWriter.writeLog():

public function writeLog(string $channel, string $level, string $message, array $context = [])
{
    if (!in_array($channel, array_keys($this->channels))) {
        throw new InvalidArgumentException('Invalid channel used.');
    }

    $logger = \App::make("{$channel}log");
    $channelHandler = new ChannelStreamHandler(
        $channel,
        storage_path() . '/' . $this->channels[$channel]['path'],
        $this->channels[$channel]['level']
    );
    $logger->pushHandler($channelHandler);
    $logger->{$level}($message);
}

and in your AppServiceProvider:

    $this->app->bind('eventlog', function () {
        return new Logger('event');
    });

    $this->app->bind('auditlog', function () {
        return new Logger('audit');
    });

I'll try bundle this together into a package.