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

Rector run Failed:

{ "totals": { "changed_files": 0, "errors": 1 }, "errors": [ { "message": "System error: \"Scope not available on \"PhpParser\\Node\\Expr\\Array_\" node. Fix scope refresh on changed nodes first\"\nRun Rector with \"--debug\" option and post the report here: https://github.com/rectorphp/rector/issues/new", "file": "/var/www/storage/demo/35glzrxkdffne62rw3i2/rector_analyzed_file.php", "line": 19 } ] }

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

PHP snippet to change

<?php

     declare(strict_types=1);

     function foo(mixed ...$args): void {}

     class ReproCase
     {
         public function test(): void
         {
             foo('first', ['key' => 'value'], c: 'test');
         }
     }

Config rector.php

<?php

use Rector\Config\RectorConfig;
use Rector\Php81\Rector\Array_\ArrayToFirstClassCallableRector;

return RectorConfig::configure()
    ->withRules([
        ArrayToFirstClassCallableRector::class
    ]);

Rector version: 84fe92 - released at 2026-04-11 21:41