Instant upgrade and refactoring of your PHP code

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v0.5.7 2019-06-28 11:38 UTC


Rector is a reconstructor tool - it does instant upgrades and instant refactoring of your code. Why doing it manually if 80% Rector can handle for you?

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Rector grows faster with your help, the more you help the more work it saves you. Check out Rector's Patreon. One-time donation is welcomed trough PayPal.

Open-Source First

Rector instantly upgrades and instantly refactors PHP code of your application. It covers many open-source projects and PHP changes itself:

php.png space.png cakephp.png space.png symfony.png space.png easy-admin.png space.png sylius.png space.png phpunit.jpg space.png twig.png space.png laravel.png space.png silverstripe.jpg

What can Rector do for You?

...look at overview of all available Rectors with before/after diffs and configuration examples. You can use them to build your own sets.

How to Apply Coding Standards?

AST libraries that Rector use, doesn't work well with coding standards, so it's better to let coding standard tools do that.

Your project doesn't have one? Consider adding EasyCodingStandard, PHP CS Fixer or PHP_CodeSniffer.


composer require rector/rector --dev

Do you have conflicts on composer require or on run?

Extra Autoloading

Rector relies on project and autoloading of its classes. To specify own autoload file, use --autoload-file option:

vendor/bin/rector process ../project --autoload-file ../project/vendor/autoload.php

Or make use of rector.yaml config:

# rector.yaml
        - 'vendor/squizlabs/php_codesniffer/autoload.php'
        - 'vendor/project-without-composer'

Exclude Paths and Rectors

You can also exclude files or directories (with regex or fnmatch):

# rector.yaml
        - '*/src/*/Tests/*'

Do you want to use whole set, except that one rule? Exclude it:

# rector.yaml
        - 'Rector\CodeQuality\Rector\If_\SimplifyIfReturnBoolRector'

By default Rector uses language features of your PHP version. If you you want to use different PHP version than your system, put it in config:

    php_version_features: '7.2' # your version 7.3

Running Rector

A. Prepared Sets

Featured open-source projects have prepared sets. You'll find them in /config/set or by calling:

vendor/bin/rector levels

Let's say you pick symfony40 level and you want to upgrade your /src directory:

# show known changes in Symfony 4.0
vendor/bin/rector process src --level symfony40 --dry-run
# apply
vendor/bin/rector process src --level symfony40

B. Custom Sets

  1. Create rector.yaml with desired Rectors:

            $annotation: "inject"
  2. Run on your /src directory:

    vendor/bin/rector process src --dry-run
    # apply
    vendor/bin/rector process src

3 Steps to Create Own Rector

First, make sure it's not covered by any existing Rectors yet.

Let's say we want to change method calls from set* to change*.

 $user = new User();

1. Create New Rector and Implement Methods

Create class that extends Rector\Rector\AbstractRector. It has useful methods like checking node type and name. Just run $this-> and let PHPStorm show you all possible methods.

<?php declare(strict_types=1);

namespace App\Rector;

use Nette\Utils\Strings;
use PhpParser\Node;
use PhpParser\Node\Identifier;
use PhpParser\Node\Expr\MethodCall;
use Rector\Rector\AbstractRector;
use Rector\RectorDefinition\CodeSample;
use Rector\RectorDefinition\RectorDefinition;

final class MyFirstRector extends AbstractRector
    public function getDefinition(): RectorDefinition
        // what does this do?
        // minimalistic before/after sample - to explain in code
        return new RectorDefinition('Change method calls from set* to change*.', [
            new CodeSample('$user->setPassword("123456");', '$user->changePassword("123456");')

     * @return string[]
    public function getNodeTypes(): array
        // what node types we look for?
        // pick any node from
        return [MethodCall::class];

     * @param MethodCall $node - we can add "MethodCall" type here, because only this node is in "getNodeTypes()"
    public function refactor(Node $node): ?Node
        // we only care about "set*" method names
        if (! $this->isName($node, 'set*')) {
            // return null to skip it
            return null;

        $methodCallName = $this->getName($node);
        $newMethodCallName = Strings::replace($methodCallName, '#^set#', 'change');

        $node->name = new Identifier($newMethodCallName);

        // return $node if you modified it
        return $node;

2. Register it

# rector.yaml
    App\Rector\MyFirstRector: ~

3. Let Rector Refactor Your Code

# see the diff first
vendor/bin/rector process src --dry-run

# if it's ok, apply
vendor/bin/rector process src

That's it!

More Detailed Documentation

How to Contribute

Just follow 3 rules:

  • 1 feature per pull-request

  • New feature needs tests

  • Tests, coding standards and PHPStan checks must pass:

    composer complete-check

    Don you need to fix coding standards? Run:

    composer fix-cs

We would be happy to merge your feature then.

Run Rector in Docker

With this command, you can process your project with rector from docker:

docker run -v $(pwd):/project rector/rector:latest process /project/src --level symfony40 --dry-run

# Note that a volume is mounted from `pwd` into `/project` which can be accessed later.

Using rector.yaml:

docker run -v $(pwd):/project rector/rector:latest process /project/app --config /project/rector.yaml --autoload-file /project/vendor/autoload.php --dry-run

Community Packages

Do you use Rector to upgrade your code? Share it here: