PHP Manual: ReflectionFunctionAbstract::getTentativeReturnType

public function ReflectionFunctionAbstract::getTentativeReturnType(): ?ReflectionType

Returns the tentative return type associated with the function.

This function has no parameters.

Returns a ReflectionType object if a tentative return type is specified, null otherwise.

Example #1 ReflectionFunctionAbstract::getTentativeReturnType() example

<?php

$method = new ReflectionMethod(\ArrayAccess::class, 'offsetGet');
var_dump($method->getTentativeReturnType());

The above example will output something similar to:

object(ReflectionNamedType)#2 (0) {
}

ReflectionFunctionAbstract::getTentativeReturnType