.. index:: single: Requirements
Symfony 2.7 requires PHP 5.3.9 or higher to run, in addition to other minor requirements. To make things simple, Symfony provides a tool to quickly check if your system meets all those requirements.
Beware that PHP can define a different configuration for the command console and the web server, so you need to check requirements in both environments.
Symfony includes a config.php file in the web/ directory of your project.
Open that file with your browser to check the requirements.
Once you've fixed all the reported issues, delete the web/config.php file
to avoid leaking internal information about your application to visitors.
Open your console or terminal, enter in your project directory, execute this command and fix the reported issues:
$ cd my-project/
$ php app/check.php