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Logger::setHandlers() is intended to help dependency injection systems that deal more elegantly with property setters than constructor arguments. Alongside getHandlers(), pushHandler(), popHandler(), it is a logical addition to the API. It also attempts to address some possible errors in the format of the data passed: - If a map is passed, the keys are removed, as these aren’t expected by Monolog - If falsey values are included, these are stripped It relies on Logger::pushHandler() internally, so that if any special behaviour is added in the future, this only needs to be added in one place.
Monolog - Logging for PHP 
Monolog sends your logs to files, sockets, inboxes, databases and various web services. See the complete list of handlers below. Special handlers allow you to build advanced logging strategies.
This library implements the PSR-3 interface that you can type-hint against in your own libraries to keep a maximum of interoperability. You can also use it in your applications to make sure you can always use another compatible logger at a later time. As of 1.11.0 Monolog public APIs will also accept PSR-3 log levels. Internally Monolog still uses its own level scheme since it predates PSR-3.
Installation
Install the latest version with
$ composer require monolog/monolog
Basic Usage
<?php
use Monolog\Logger;
use Monolog\Handler\StreamHandler;
// create a log channel
$log = new Logger('name');
$log->pushHandler(new StreamHandler('path/to/your.log', Logger::WARNING));
// add records to the log
$log->addWarning('Foo');
$log->addError('Bar');
Documentation
Third Party Packages
Third party handlers, formatters and processors are listed in the wiki. You can also add your own there if you publish one.
About
Requirements
- Monolog works with PHP 5.3 or above, and is also tested to work with HHVM.
Submitting bugs and feature requests
Bugs and feature request are tracked on GitHub
Framework Integrations
- Frameworks and libraries using PSR-3 can be used very easily with Monolog since it implements the interface.
- Symfony2 comes out of the box with Monolog.
- Silex comes out of the box with Monolog.
- Laravel 4 & 5 come out of the box with Monolog.
- Lumen comes out of the box with Monolog.
- PPI comes out of the box with Monolog.
- CakePHP is usable with Monolog via the cakephp-monolog plugin.
- Slim is usable with Monolog via the Slim-Monolog log writer.
- XOOPS 2.6 comes out of the box with Monolog.
- Aura.Web_Project comes out of the box with Monolog.
- Nette Framework can be used with Monolog via Kdyby/Monolog extension.
- Proton Micro Framework comes out of the box with Monolog.
Author
Jordi Boggiano - j.boggiano@seld.be - http://twitter.com/seldaek
See also the list of contributors which participated in this project.
License
Monolog is licensed under the MIT License - see the LICENSE file for details
Acknowledgements
This library is heavily inspired by Python's Logbook library, although most concepts have been adjusted to fit to the PHP world.