Summarize Twig integration documentation

[javiereguiluz]

This issue has been created to ask documentation managers and community in general if you think it could be a good idea to summarize somewhere all the Twig features exclusive to Symfony applications.

This information cannot be added to the official Twig documentation so right know most (all?) of the things are dispersed in the Symfony docs. It's not common, but sometimes I've needed the full list of Twig features exclusive for Symfony, so I'd like to add it somewhere.

The idea is not to duplicate the explanations of the doc, but to summarize all these features in a single location. Things we could talk about:

• asset() function
• path() and url() function
• app global object
• trans and transchoice filters
• twig:lint and twig:debug commands
• what else?

[xabbuh]

We already have the reference for form functions and variables which are also specific to Symfony. So, I don't see why we should not build a general section with all the specific things. 👍

[wouterj]

We already have such document: http://symfony.com/doc/current/reference/twig_reference.html (except from the commands)

[javiereguiluz]

@wouterj that's exactly what I wanted and couldn't find! Thanks Wouter! I wonder why I failed miserably at finding this article :(

A comment about the document: the table layout looks awful because the code is packed and syntax highlighting is missing. Could we update it or you prefer the current compact layout?

[wouterj]

@javiereguiluz while I introduced the table, I do fully agree that it doesn't look great. I've updated the complete twig reference to be a lot nicer and have a lot more usefull information: #4313

[wouterj]

Fixed now