* Use `camelCase`_ for PHP variables, function and method names, arguments

(e.g. ``$acceptableContentTypes``, ``hasSession()``);

*Use `snake_case`_ for configuration parametersand Twig template variables

(e.g. ``framework.csrf_protection``, ``http_status_code``);

Use `snake_case`_ for configuration parameters, route namesand Twig template

variables(e.g. ``framework.csrf_protection``, ``http_status_code``);

* Use SCREAMING_SNAKE_CASE for constants (e.g. ``InputArgument::IS_ARRAY``);