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
 
 new \App\SomeOldClass;
-new \App\SomeOldClass2;
+new \App\SomeNewClass2;

PHP snippet to change

<?php

new \App\SomeOldClass;
new \App\SomeOldClass2;

Applied Rules:

RenameClassRector

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;
use Rector\Renaming\Rector\Name\RenameClassRector;

return static function (RectorConfig $rectorConfig): void {
    // included from set
    $rectorConfig->ruleWithConfiguration(RenameClassRector::class, [
        'App\SomeOldClass' => 'App\SomeNewClass',
    ]);
    
    // reset config on target rule
    $r = new \ReflectionProperty($rectorConfig, 'ruleConfigurations');
    $value = $r->getValue($rectorConfig);
    $value[RenameClassRector::class] = [];    
    $r->setValue($rectorConfig, $value);
    
    // replace
    $rectorConfig->ruleWithConfiguration(RenameClassRector::class, [
        'App\SomeOldClass2' => 'App\SomeNewClass2',
    ]);
};

Rector version: 2.4.2 - released at 2026-04-16 14:00