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
 
 class Demo
 {
-    public static function getOptions()
+    /**
+     * @return mixed[]
+     */
+    public static function getOptions(): array
     {
-        function sortByOrder(array $a, array $b): int
-        {
-            return strcmp((string) $a['label'], (string) $b['label']);
-        }
-
         $options = [
             ['value' => 'b', 'label' => 'Bravo'],
             ['value' => 'a', 'label' => 'Alpha'],

PHP snippet to change

<?php

class Demo
{
    public static function getOptions()
    {
        function sortByOrder(array $a, array $b): int
        {
            return strcmp((string) $a['label'], (string) $b['label']);
        }

        $options = [
            ['value' => 'b', 'label' => 'Bravo'],
            ['value' => 'a', 'label' => 'Alpha'],
        ];

        usort($options, 'sortByOrder');

        return $options;
    }
}

Applied Rules:

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Config rector.php

<?php

use Rector\Config\RectorConfig;
use Rector\TypeDeclaration\Rector\Property\TypedPropertyFromAssignsRector;
use Rector\ValueObject\PhpVersion;
use Rector\CodeQuality\Rector\Class_\InnerFunctionToPrivateMethodRector;
use Rector\DeadCode\Rector\ClassMethod\RemoveUnusedPrivateMethodRector;

return RectorConfig::configure()
    // A. whole set
    ->withPreparedSets(typeDeclarations: true)
    // B. or few rules
    ->withRules([
        InnerFunctionToPrivateMethodRector::class,
        RemoveUnusedPrivateMethodRector::class,
    ])
    // demonstrate specific PHP version
    ->withPhpVersion(PhpVersion::PHP_84);

Rector version: d1a635 - released at 2026-07-08 23:03