How to Log Messages to different Files
How to Log Messages to different Files¶
The Symfony Standard Edition contains a bunch of channels for logging: doctrine
,
event
, security
and request
. Each channel corresponds to a logger
service (monolog.logger.XXX
) in the container and is injected to the
concerned service. The purpose of channels is to be able to organize different
types of log messages.
By default, Symfony logs every message into a single file (regardless of the channel).
Switching a Channel to a different Handler¶
Now, suppose you want to log the doctrine
channel to a different file.
To do so, just create a new handler and configure it like this:
- YAML
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# app/config/config.yml monolog: handlers: main: type: stream path: /var/log/symfony.log channels: ["!doctrine"] doctrine: type: stream path: /var/log/doctrine.log channels: [doctrine]
- XML
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<!-- app/config/config.xml --> <container xmlns="http://symfony.com/schema/dic/services" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:monolog="http://symfony.com/schema/dic/monolog" xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd http://symfony.com/schema/dic/monolog http://symfony.com/schema/dic/monolog/monolog-1.0.xsd" > <monolog:config> <monolog:handler name="main" type="stream" path="/var/log/symfony.log"> <monolog:channels> <monolog:channel>!doctrine</monolog:channel> </monolog:channels> </monolog:handler> <monolog:handler name="doctrine" type="stream" path="/var/log/doctrine.log"> <monolog:channels> <monolog:channel>doctrine</monolog:channel> </monolog:channels> </monolog:handler> </monolog:config> </container>
- PHP
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// app/config/config.php $container->loadFromExtension('monolog', array( 'handlers' => array( 'main' => array( 'type' => 'stream', 'path' => '/var/log/symfony.log', 'channels' => array( '!doctrine', ), ), 'doctrine' => array( 'type' => 'stream', 'path' => '/var/log/doctrine.log', 'channels' => array( 'doctrine', ), ), ), ));
YAML Specification¶
You can specify the configuration by many forms:
1 2 3 4 5 6 7 | channels: ~ # Include all the channels
channels: foo # Include only channel "foo"
channels: "!foo" # Include all channels, except "foo"
channels: [foo, bar] # Include only channels "foo" and "bar"
channels: ["!foo", "!bar"] # Include all channels, except "foo" and "bar"
|
Creating your own Channel¶
You can change the channel monolog logs to one service at a time. This is done either via the configuration below or by tagging your service with monolog.logger and specifying which channel the service should log to. With the tag, the logger that is injected into that service is preconfigured to use the channel you’ve specified.
Configure Additional Channels without Tagged Services¶
New in version 2.4: This feature was introduced to the MonologBundle 2.4, which was first packaged with Symfony 2.4.
With MonologBundle 2.4 you can configure additional channels without the need to tag your services:
- YAML
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# app/config/config.yml monolog: channels: ["foo", "bar"]
- XML
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<!-- app/config/config.xml --> <container xmlns="http://symfony.com/schema/dic/services" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:monolog="http://symfony.com/schema/dic/monolog" xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd http://symfony.com/schema/dic/monolog http://symfony.com/schema/dic/monolog/monolog-1.0.xsd" > <monolog:config> <monolog:channel>foo</monolog:channel> <monolog:channel>bar</monolog:channel> </monolog:config> </container>
- PHP
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// app/config/config.php $container->loadFromExtension('monolog', array( 'channels' => array( 'foo', 'bar', ), ));
With this, you can now send log messages to the foo
channel by using
the automatically registered logger service monolog.logger.foo
.
Learn more from the Cookbook¶
This work, including the code samples, is licensed under a Creative Commons BY-SA 3.0 license.