AddReturnArrayDocblockBasedOnArrayMapRector

Find another rule

Add @return array docblock based on array_map() return strict type

 class SomeClass
 {
+    /**
+     * @return int[]
+     */
     public function getItems(array $items)
     {
         return array_map(function ($item): int {
             return $item->id;
         }, $items);
     }
 }

Configure your rector.php:

<?php

use Rector\Config\RectorConfig;
use Rector\TypeDeclaration\Rector\ClassMethod\AddReturnArrayDocblockBasedOnArrayMapRector;

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