You are browsing the documentation for Symfony 2.2 which is not maintained anymore.
Consider upgrading your projects to Symfony 5.2.
Learn about every configuration option available in Symfony applications and discover the power of customizing the framework the way you want.
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.
Forms and Validation
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