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How to Configure Monolog to Exclude Specific HTTP Codes from the Log

4.1 version
Maintained

How to Configure Monolog to Exclude Specific HTTP Codes from the LogΒΆ

..versionadded:: 4.1
The ability to exclude log messages based on their status codes was introduced in Symfony 4.1 and MonologBundle 3.3.

Sometimes your logs become flooded with unwanted HTTP errors, for example, 403s and 404s. When using a fingers_crossed handler, you can exclude logging these HTTP codes based on the MonologBundle configuration:

  • YAML
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    # config/packages/prod/monolog.yaml
    monolog:
        handlers:
            main:
                # ...
                type: fingers_crossed
                handler: ...
                excluded_http_codes: [403, 404, { 400: ['^/foo', '^/bar'] }]
    
  • XML
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    <!-- config/packages/prod/monolog.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 type="fingers_crossed" name="main" handler="...">
                <!-- ... -->
                <monolog:excluded-http-code code="403">
                    <monolog:url>^/foo</monolog:url>
                    <monolog:url>^/bar</monolog:url>
                </monolog:excluded-http-code>
                <monolog:excluded-http-code code="404" />
            </monolog:handler>
        </monolog:config>
    </container>
    
  • PHP
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    // config/packages/prod/monolog.php
    $container->loadFromExtension('monolog', array(
        'handlers' => array(
            'main' => array(
                // ...
                'type'                => 'fingers_crossed',
                'handler'             => ...,
                'excluded_http_codes' => array(403, 404),
            ),
        ),
    ));
    

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