Example of logging plugin to Wordpress

function.php

add_action('aal_insert_log',  'storeActivityToFile');

function storeActivityToFile($args) {
    // Example
    $args = array(
        'action'         => 'activated',
        'object_type'    => 'Plugin',
        'object_subtype' => '',
        'object_name'    => 'Activity Log',
        'object_id'      => 0,
        'user_id'        => 1,
        'user_caps'      => 'administrator',
        'hist_ip'        => '127.0.0.1',
        'hist_time'      => 1460476892,
    );
    addLogEntry('info', 'activity_log', $args);
}

logger.php

<?php
/*
Plugin Name: Logging
Plugin URI: http://wordpress.org/tnyholm
Description: Logging stuff with Monolog
Author: Tobias Nyholm
Version: 0.1
Author URI: http://tnyholm.se
*/

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

// make sure to load composer autoload
require_once __DIR__."/../../../vendor/autoload.php";

class MyLogger
{
    /**
     * @var Logger
     */
    private $monolog;

    public function __construct()
    {
        // Create the logger
        $this->monolog = new Logger('my_logger');

        // Now add some handlers
        $this->monolog->pushHandler(new StreamHandler(__DIR__.'/my_app.log', Logger::DEBUG));
        $this->monolog->pushHandler(new SlackHandler('t0ken', 'happyr'));
    }

    public function log($level, $message, array $context = [])
    {
        $this->monolog->log($level, $message, $context);
    }
}

function addLogEntry($level, $message, array $context = [])
{
    global $logger;
    if (!$logger) {
        $logger = new MyLogger();
    }

    $logger->log($level, $message, $context);
}

Sweet, då håller jag utkik där istället 😄