How to use symfony2 twig extension without symfony2

Question

I want to use some of the builtin symfony2 extensions(e.g:humanize,yaml_dump) for twig for a website not developed in symfony but using a twig engine.how can I do that?

Have you checked the twig (not the symfony) manual? It shows how to add extensions. twig.sensiolabs.org/doc/api.html#using-extensions — Cerad
– Cerad, Commented Feb 15, 2014 at 13:06
yes but I don't know how to access the builtin extensions of symfony2 — user2268997
– user2268997, Commented Feb 15, 2014 at 13:10

Nicolai Fröhlich · Accepted Answer · 2014-02-15 14:49:28Z

5

The symfony/twig-bridge package provides the symfony-specific twig extensions.

These include i.e. the YamlExtension that provides the yaml_dump filter and the FormExtension that provides the humanize filter.

The extensions can be found in the Extension folder.

I strongly advise you to install the package via composer to get the package's dependencies automatically.

composer require symfony/twig-bridge:~2.3

Further composer will automatically register the classes in the autoloader (vendor/autoload.php) for you.

Now you just need to add the extensions to twig as described in the documentation.

$twig->addExtension(new \Symfony\Bridge\Twig\Extension\YamlExtension());
// ...

answered Feb 15, 2014 at 14:49

Nicolai Fröhlich

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1 Comment

user2268997 Over a year ago

Thank you.Also with the risk of sounding dimwitted: is it possible to configure twig so that you don't have to load the extension everytime like the built-in extensions?

Alain · Accepted Answer · 2014-02-16 12:26:21Z

1

A complete example, with an extension class and a quick extension (a new filter) :

<?php

require_once("vendor/autoload.php");

$loader = new Twig_Loader_String();
$twig = new Twig_Environment($loader);

// here we add the extension class (taken from @nifr answer)
$twig->addExtension(new \Symfony\Bridge\Twig\Extension\YamlExtension());

// here we add a new filter quickly
$filter = new Twig_SimpleFilter('paragraph', function ($argument) {
    return "<p>{$argument}</p>";
}, array('pre_escape' => 'html', 'is_safe' => array('html')));
$twig->addFilter($filter);

// demo
echo $twig->render('{{ "hello" | paragraph }}');

answered Feb 16, 2014 at 12:26

Alain

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2 Comments

user2268997 Over a year ago

hey man,how is twig_loader_string being used here?i read the documentation but couldn't figure.

Alain Over a year ago

It is used so $twig->render() takes a string instead of a file as first argument.

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