Try Rector Online | Rector - Automated Way to Instantly Upgrade and Refactor any PHP code

Run Rector on your code to see what it can do for you:

 <?php
 
 declare(strict_types=1);

 
 readonly class Foo extends FooBase implements FooInterface
 {
+    /**
+     * @return array<int, int>
+     */
     #[Override]
     public function getCodes(): iterable
     {

         ];
     }
 
+    /**
+     * @return array<int, string>
+     */
     #[Override]
     public function getMethods(): iterable
     {

PHP snippet to change

<?php

declare(strict_types=1);

interface FooInterface
{
    /**
     * @return int[]
     */
    public function getCodes(): iterable;
}

readonly abstract class FooBase
{
    /**
     * @return string[]
     */
    abstract public function getMethods(): iterable;
}

readonly class Foo extends FooBase implements FooInterface
{
    #[Override]
    public function getCodes(): iterable
    {
        return [
            200,
            201,
        ];
    }

    #[Override]
    public function getMethods(): iterable
    {
        return [
            'GET',
            'POST',
        ];
    }

    /**
     * @return string[]
     */
    public function getProtocols(): iterable
    {
        return [
            'http',
            'https',
        ];
    }
}

Applied Rules:

DocblockReturnArrayFromDirectArrayInstanceRector

Not a change you expect?

Create an issue on GitHub
...or to speed up fix – add a test fixture

Config rector.php

<?php

declare(strict_types=1);

use Rector\Config\RectorConfig;

return RectorConfig::configure()
    ->withPreparedSets(
        typeDeclarationDocblocks: true,
    )
;

Rector version: b855ff - released at 2026-01-22 19:37