symfony - how to configure a public template variable

Question

How to configure a public template variable, I now want to configure a css domain name. I want to configure it in a public configuration file and then remove it from the template. How should it be configured and implemented in symfony2? Asking for configuration method and template calling method

Answer 1

In app/config/config.yml:

twig:
    globals:
        css_host: css1

In your template:

{{ css_host }}.example.com