Rector\TypeDeclaration\Rector\ClassMethod\ReturnNullableTypeRector

ReturnNullableTypeRector

Add basic ? nullable type to class methods and functions, as of PHP 7.1

 final class SomeClass
 {
-    public function getData()
+    public function getData(): ?int
     {
         if (rand(0, 1)) {
             return null;
         }

         return 100;
     }
 }

Configure your rector.php:

<?php

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

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

SETS: Type Declarations