Config.yml: Control Center for Services

Hi Daniel!

Ah, that's a great question. For the most part, these values cannot be changed at runtime. The reason is that they're read statically ONE time (when you deploy) and used to write out all the configuration for how to instantiate the services. If you want to change something at run-time, it won't be done via config.yml. Instead, you'll need to look into the specific library that you're using (e.g. Twig) and see how you might change the setting you want at runtime. This doesn't come up very often, and whether or not something is easy just depends on the situation.

In this particular situation, the setting is passed to the Twig_Extension_Core class: https://github.com/twigphp/Twig/blob/1.x/lib/Twig/Extension/Core.php#L102. To set this at run-time, you would need to fetch this off of the twig service and set it. From a controller:

$this->container->get('twig')
    ->getExtension('core') // core is the getName() from that Core.php file
    ->setNumberFormat(2, ',', '.');

Cheers!

Hey Christophe,

Well, that's probably OK so long as you know that variable's content comes from your code, but not from user input. Otherwise, you need to think about filtering user input. You could do it by yourself, for example create a custom twig filter which will do filtering and mark output safe for html which allows to you do not use raw filter in templates. Or use some third-party filtering library. The most popular is ezyang/htmlpurifier. BTW, you could check an example of its implementation for markdown service in symfony-demo project.

Cheers!

Hey Richie Hamburg!

I'm going to link this comment to our internal screencast ideas list. In short, I think you're right. But more broadly, we just haven't talked about translation or internationalization at all - it's sort of "out of the scope" of this tutorial, but not something that we actually cover anywhere. And this topic touches on a lot of things - date transformations in Twig, thousands separator in the form component, thousands separator in Twig's number_format, translations, etc. I think it could deserve its own attention!

Cheers!