DocblockVarArrayFromPropertyDefaultsRector

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Add @var array docblock to array property based on iterable default value

 class SomeClass
 {
+    /**
+     * @var int[]
+     */
     private array $items = [1, 2, 3];
 }

Configure your rector.php:

<?php

use Rector\Config\RectorConfig;
use Rector\TypeDeclarationDocblocks\Rector\Class_\DocblockVarArrayFromPropertyDefaultsRector;

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