This package provides you a set of stubs for RdKafka extension. It currently supports version >6. For older verisions of rdkafka extenstion (3.x and 0.9) please use version 1.x of this repository.
Add package to your composer.json dev dependencies
$ composer require kwn/php-rdkafka-stubs --dev
Once package is installed, your IDE should simply discover all stubs automatically. Please notice, that kwn/php-rdkafka-stubs
package has no autoloader configuration provided, so stubs classes are visible in your IDE, but don't clashes with rdkafka
extension namespaces.