Symfony + Monolog, sending logs to email

config_prod.yml

monolog:
    handlers:
        main:
            type: fingers_crossed
            action_level: error
            handler: grouped
        grouped:
            type: group
            members: [streamed, buffered]
        streamed:
            type: stream
            path: %kernel.logs_dir%/%kernel.environment%.log
            level: error
        buffered:
            type: buffer
            handler: email
            level: critical
        email:
            type: service
            id: monolog.handler.swift_html

services.yml

services:
    monolog.handler.swift_html:
        class: Foo\Bar\SwiftMailerHtmlHandler
        arguments:
            - @swiftmailer.mailer
            - %email.robot% # from email address
            - %email.admin% # to email address
            - 'title goes here'
        calls:
            - [setFormatter, [@monolog.formatter.html]]

SwiftMailerHtmlHandler.php

<?php

namespace Foo\Bar;

use Monolog\Handler\SwiftMailerHandler;
use Monolog\Logger;

/**
 * SwiftMailerHtmlHandler uses Swift_Mailer to send emails with text/html body
 */
class SwiftMailerHtmlHandler extends SwiftMailerHandler
{
    /**
     * @param \Swift_Mailer $mailer  The mailer to use
     * @param string        $from    The address of sender
     * @param string        $to      The address of receiver
     * @param string        $subject The subject of message
     * @param integer       $level   The minimum logging level at which this handler will be triggered
     * @param Boolean       $bubble  Whether the messages that are handled can bubble up the stack or not
     */
    public function __construct(\Swift_Mailer $mailer, $from, $to, $subject, $level = Logger::ERROR, $bubble = true)
    {
        $message = \Swift_Message::newInstance()
                ->setSubject($subject)
                ->setFrom($from)
                ->setTo($to)
                ->setContentType('text/html');
        parent::__construct($mailer, $message, $level, $bubble);
    }
}

Monolog must be at least 1.8.0, to use monolog.formatter.html

Thanks so much, i hope you leave the gist public for a long time !