PHP: How to use monolog to log to console (php://out)?

The solution is rather simple. Since the example shows a StreamHandler it’s possible to pass in a stream (instead of the path to a file). By default, everything that is echo’ed in PHP is written to php://stdout / php://output so we can simple use one of those as stream for the StreamHandler:

<?php

use Monolog\Logger;
use Monolog\Handler\StreamHandler;

// create a log channel
$log = new Logger('name');
$log->pushHandler(new StreamHandler('php://stdout', Logger::WARNING)); // <<< uses a stream

// add records to the log
$log->warning('Foo');
$log->error('Bar');

Hope this saves somebody some time 🙂