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

4.2 version

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

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
            https://symfony.com/schema/dic/services/services-1.0.xsd
            http://symfony.com/schema/dic/monolog
            https://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', [
        'handlers' => [
            'main' => [
                // ...
                'type'                => 'fingers_crossed',
                'handler'             => ...,
                'excluded_http_codes' => [403, 404],
            ],
        ],
    ]);
    

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