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
 
 namespace ReproC;

         return $this->sink([[["d" => 1]]]);      // same, nested one level deeper
     }
 
+    /**
+     * @param array<mixed[], mixed> $data
+     */
     protected function sink(array $data)
     {
         return $data;
     }
 }

PHP snippet to change

<?php

namespace ReproC;

class V
{
    public function one()
    {
        return $this->sink([["x" => 1], "s"]);   // list mixing a string-keyed array with a scalar
    }

    public function two()
    {
        return $this->sink([[["d" => 1]]]);      // same, nested one level deeper
    }

    protected function sink(array $data)
    {
        return $data;
    }
}

Applied Rules:

ClassMethodArrayDocblockParamFromLocalCallsRector

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;
use Rector\TypeDeclarationDocblocks\Rector\Class_\ClassMethodArrayDocblockParamFromLocalCallsRector;

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

Rector version: fa3b72 - released at 2026-08-29 22:08