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:

 {
     public function run(array $params): string
     {
-		return "Hello, " . (string)($params['name'] ?? 'World');
+		return "Hello, " . $params['name'] ?? 'World';
     }
 }
 
 var_dump((new DemoFile())->run(['FAIL']));

PHP snippet to change

<?php

final class DemoFile
{
    public function run(array $params): string
    {
		return "Hello, " . (string)($params['name'] ?? 'World');
    }
}

var_dump((new DemoFile())->run(['FAIL']));

Applied Rules:

RemoveConcatAutocastRector

Not a change you expect?

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

Config rector.php

<?php

use Rector\Config\RectorConfig;

return RectorConfig::configure()
    ->withRules([
        Rector\DeadCode\Rector\Concat\RemoveConcatAutocastRector::class,
    ]);

Rector version: 817bbb - released at 2025-11-05 18:59