NarrowBoolDocblockReturnTypeRector

Find another rule

Narrow @return docblock "bool" to "false" or "true" when the native return type only allows one of them

 class SomeClass
 {
     /**
-     * @return bool|string[]
+     * @return false|string[]
      */
     public function run(): false|array
     {
         return false;
     }
 }

Configure your rector.php:

<?php

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

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