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Read the updated version of this page for Symfony 5.3 (the current stable version).
Ever wondered what configuration options you have available to you in files such as
app/config/config.yml? In this section, all the available configuration is broken down by the key (e.g.
framework) that defines each possible section of your Symfony2 configuration.
- Configuring the Kernel (e.g. AppKernel)
Forms and Validation
- Twig Extensions (forms, filters, tags, etc) Reference