PhpStan extenstion for Twig templates

Inspired by blog series by @TomasVortuba - https://tomasvotruba.com/blog/stamp-1-how-to-compile-twig-to-php/

Known issues

• Performance
  • Currently, templates are processed only sequentially
  • Same templates with same variables included in multiple templates are checked multiple times
  • High memory usage when depth of included templates is higher
• Method name guessing is not supported. I believe that template engine should not guess which method programmer wanted to use. Therefore, if you want to use method, use it with full name and parentheses {{ class.fullMethodName() }}

Installation

To use this extension, require it in Composer:

composer require --dev driveto/phpstan-twig

Include extension.neon in your project's PHPStan config:

includes:
    - vendor/driveto/phpstan-twig/extension.neon

Add path to Twig service in phpstan.neon:

parameters:
    twig:
        twigEnvironmentLoader: tests/TwigEnvironmentLoader.php

Example of Twig loader:

use App\Kernel;
use Symfony\Component\Dotenv\Dotenv;

require __DIR__ . '/../vendor/autoload.php';

(new Dotenv())->bootEnv(__DIR__ . '/../.env');

$kernel = new Kernel($_SERVER['APP_ENV'], (bool) $_SERVER['APP_DEBUG']);
$kernel->boot();
return $kernel->getContainer()->get('twig');