How to Log Messages to different Files
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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
- XML
- PHP
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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]
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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>
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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:
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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
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
- XML
- PHP
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# app/config/config.yml
monolog:
channels: ["foo", "bar"]
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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>
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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
.