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PHPStan Symfony Framework extensions and rules

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This extension provides following features:

  • Provides correct return type for ContainerInterface::get() and ::has() methods.
  • Provides correct return type for Controller::get() and ::has() methods.
  • Provides correct return type for AbstractController::get() and ::has() methods.
  • Provides correct return type for ContainerInterface::getParameter() and ::hasParameter() methods.
  • Provides correct return type for ParameterBagInterface::get() and ::has() methods.
  • Provides correct return type for Controller::getParameter() method.
  • Provides correct return type for AbstractController::getParameter() method.
  • Provides correct return type for Request::getContent() method based on the $asResource parameter.
  • Provides correct return type for HeaderBag::get() method based on the $first parameter.
  • Provides correct return type for Envelope::all() method based on the $stampFqcn parameter.
  • Provides correct return type for InputBag::get() method based on the $default parameter.
  • Provides correct return type for InputBag::all() method based on the $key parameter.
  • Provides correct return types for TreeBuilder and NodeDefinition objects.
  • Notifies you when you try to get an unregistered service from the container.
  • Notifies you when you try to get a private service from the container.
  • Optionally correct return types for InputInterface::getArgument(), ::getOption, ::hasArgument, and ::hasOption.

Installation

To use this extension, require it in Composer:

composer require --dev phpstan/phpstan-symfony

If you also install phpstan/extension-installer then you're all set!

Manual installation

If you don't want to use phpstan/extension-installer, include extension.neon in your project's PHPStan config:

includes:
    - vendor/phpstan/phpstan-symfony/extension.neon

To perform framework-specific checks, include also this file:

includes:
    - vendor/phpstan/phpstan-symfony/rules.neon

Configuration

You have to provide a path to srcDevDebugProjectContainer.xml or similar XML file describing your container.

parameters:
    symfony:
        container_xml_path: var/cache/dev/srcDevDebugProjectContainer.xml
        # or with Symfony 4.2+
        container_xml_path: var/cache/dev/srcApp_KernelDevDebugContainer.xml
        # or with Symfony 5+
        container_xml_path: var/cache/dev/App_KernelDevDebugContainer.xml

Constant hassers

Sometimes, when you are dealing with optional dependencies, the ::has() methods can cause problems. For example, the following construct would complain that the condition is always either on or off, depending on whether you have the dependency for service installed:

if ($this->has('service')) {
    // ...
}

In that case, you can disable the ::has() method return type resolving like this:

parameters:
	symfony:
		constant_hassers: false

Be aware that it may hide genuine errors in your application.

Analysis of Symfony Console Commands

You can opt in for more advanced analysis of Symfony Console Commands by providing the console application from your own application. This will allow the correct argument and option types to be inferred when accessing $input->getArgument() or $input->getOption().

parameters:
	symfony:
		console_application_loader: tests/console-application.php

Symfony 4:

// tests/console-application.php

use App\Kernel;
use Symfony\Bundle\FrameworkBundle\Console\Application;

require __DIR__ . '/../config/bootstrap.php';
$kernel = new Kernel($_SERVER['APP_ENV'], (bool) $_SERVER['APP_DEBUG']);
return new Application($kernel);

Symfony 5:

// tests/console-application.php

use App\Kernel;
use Symfony\Bundle\FrameworkBundle\Console\Application;
use Symfony\Component\Dotenv\Dotenv;

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

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

$kernel = new Kernel($_SERVER['APP_ENV'], (bool) $_SERVER['APP_DEBUG']);
return new Application($kernel);

You may then encounter an error with PhpParser:

Compile Error: Cannot Declare interface PhpParser\NodeVisitor, because the name is already in use

If this is the case, you should create a new environment for your application that will disable inlining. In config/packages/phpstan_env/parameters.yaml:

parameters:
    container.dumper.inline_class_loader: false

Call the new env in your console-application.php:

$kernel = new \App\Kernel('phpstan_env', (bool) $_SERVER['APP_DEBUG']);