Add function/closure param array type, if dim fetch is inside
$array = [['name' => 'John']];
-$result = array_map(fn ($item) => $item['name'], $array);
+$result = array_map(fn (array $item) => $item['name'], $array);Configure your rector.php:
<?php
use Rector\Config\RectorConfig;
use Rector\TypeDeclaration\Rector\FuncCall\AddArrowFunctionParamArrayWhereDimFetchRector;
return RectorConfig::configure()
->withRules([
AddArrowFunctionParamArrayWhereDimFetchRector::class,
]);
