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Introduction
============
Welcome to the documentation for Twig, the flexible, fast, and secure template
engine for PHP.
Twig is both designer and developer friendly by sticking to PHP's principles and
adding functionality useful for templating environments.
The key-features are...
* *Fast*: Twig compiles templates down to plain optimized PHP code. The
overhead compared to regular PHP code was reduced to the very minimum.
* *Secure*: Twig has a sandbox mode to evaluate untrusted template code. This
allows Twig to be used as a template language for applications where users
may modify the template design.
* *Flexible*: Twig is powered by a flexible lexer and parser. This allows the
developer to define their own custom tags and filters, and to create their own DSL.
Twig is used by many Open-Source projects like Symfony, Drupal8, eZPublish,
phpBB, Matomo, OroCRM; and many frameworks have support for it as well like
Slim, Yii, Laravel, and Codeigniter — just to name a few.
.. admonition:: Screencast
Like to learn from video tutorials? Check out the `SymfonyCasts Twig Tutorial`_!
Prerequisites
-------------
Twig 2.x needs at least **PHP 7.2.5** to run.
Installation
------------
The recommended way to install Twig is via Composer:
.. code-block:: bash
composer require "twig/twig:^2.0"
Basic API Usage
---------------
This section gives you a brief introduction to the PHP API for Twig::
require_once '/path/to/vendor/autoload.php';
$loader = new \Twig\Loader\ArrayLoader([
'index' => 'Hello {{ name }}!',
]);
$twig = new \Twig\Environment($loader);
echo $twig->render('index', ['name' => 'Fabien']);
Twig uses a loader (``\Twig\Loader\ArrayLoader``) to locate templates, and an
environment (``\Twig\Environment``) to store its configuration.
The ``render()`` method loads the template passed as a first argument and
renders it with the variables passed as a second argument.
As templates are generally stored on the filesystem, Twig also comes with a
filesystem loader::
$loader = new \Twig\Loader\FilesystemLoader('/path/to/templates');
$twig = new \Twig\Environment($loader, [
'cache' => '/path/to/compilation_cache',
]);
echo $twig->render('index.html', ['name' => 'Fabien']);
.. _`SymfonyCasts Twig Tutorial`: https://symfonycasts.com/screencast/twig