What is "symfony3"
According to the official website Symfony is a set of PHP Components, a web application framework, a philosophy and a community - all working together in harmony.
Information
This tag is specific to the Symfony 3.x, which is available on official website.
If your question is about the Symfony 2.x, please use symfony.
If your question is about the Symfony 1.x, please use symfony-1.