Laravel - Logging - Building Log Stacks

As mentioned previously, the stack driver allows you to combine multiple channels into a single log channel for convenience. To illustrate how to use log stacks, let's take a look at an example configuration that you might see in a production application:

    'channels' => [
        'stack' => [
            'driver' => 'stack',
            'channels' => ['syslog', 'slack'],
        'syslog' => [
            'driver' => 'syslog',
            'level' => 'debug',
        'slack' => [
            'driver' => 'slack',
            'url' => env('LOG_SLACK_WEBHOOK_URL'),
            'username' => 'Laravel Log',
            'emoji' => ':boom:',
            'level' => 'critical',

Let's dissect this configuration. First, notice our stack channel aggregates two other channels via its channels option: syslog and slack. So, when logging messages, both of these channels will have the opportunity to log the message. However, as we will see below, whether these channels actually log the message may be determined by the message's severity / "level".