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

Warning: You are browsing the documentation for Symfony 4.2, which is no longer maintained.

Read the updated version of this page for Symfony 6.1 (the current stable 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
XML
PHP

        1
2
3
4
5
6
7
8
        # config/packages/prod/monolog.yaml
monolog:
    handlers:
        main:
            # ...
            type: fingers_crossed
            handler: ...
            excluded_http_codes: [403, 404, { 400: ['^/foo', '^/bar'] }]
    

        1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
        <!-- 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>
    

        1
2
3
4
5
6
7
8
9
10
11
        // config/packages/prod/monolog.php
$container->loadFromExtension('monolog', [
    'handlers' => [
        'main' => [
            // ...
            'type'                => 'fingers_crossed',
            'handler'             => ...,
            'excluded_http_codes' => [403, 404],
        ],
    ],
]);
    