AddReturnDocblockForScalarArrayFromAssignsRector

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Add @return docblock for scalar array from strict array assignments

+/**
+ * @return string[]
+ */
 function getSomeItems()
 {
     $items = [];
     $items[] = 'hey';
     $items[] = 'hello';
     return $items;
 }

Configure your rector.php:

<?php

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

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