Laravel Shift broke the project by adding return types to controller methods when upgrading to Laravel 10. This rector removes the return types from the controller methods.

RemoveReturnTypesFromControllersRector.php

<?php

namespace App\Rector;

use Illuminate\Routing\Controller;
use PhpParser\Node;
use PhpParser\Node\Stmt\Class_;
use Rector\Core\Rector\AbstractRector;
use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;

/**
 * Laravel Shift broke the project by adding return types to controller methods when upgrading to Laravel 10.
 * This rector removes the return types from the controller methods.
 *
 * @author Ostap Brehin
 * @see https://github.com/rectorphp/rector
 */
final class RemoveReturnTypesFromControllersRector extends AbstractRector
{
    public function getNodeTypes(): array
    {
        return [Class_::class];
    }

    /**
     * @param Class_ $node
     */
    public function refactor(Node $node): ?Node
    {
        if (! $this->shouldRefactorClass($node)) {
            return null;
        }

        /** @var Class_ $node */
        foreach ($node->getMethods() as $method) {
            if (! $method->isPublic()) {
                continue;
            }

            $method->returnType = null;
        }

        return $node;
    }

    private function shouldRefactorClass(Class_ $class): bool
    {
        if (str_ends_with((string)$class->name, 'Controller')) {
            return true;
        }

        return in_array((string)$class->extends, [
            Controller::class,
            \App\Http\Controllers\Controller::class,
        ]);
    }

    public function getRuleDefinition(): RuleDefinition
    {
        return new RuleDefinition(
            'Remove return types from public methods in controllers',
            [
                new CodeSample(
                    <<<'CODE_SAMPLE'
class ArticleController extends Controller {
    public function show(): Response
    {
        return view('articles.show');
    }
}
CODE_SAMPLE
                    ,
                    <<<'CODE_SAMPLE'
class ArticleController extends Controller {
    public function show()
    {
        return view('articles.show');
    }
}
CODE_SAMPLE
                ),
            ]
        );
    }
}