Defining multiple function argument types in PHP

Question

Is it possible to define a function argument as multiple possible types? For example, a function may take a string or an integer to accomplish something. Is it possible to somehow define it like this?

    function something(int|string $token) {}

Or is only one type per argument supported?

(mind you, I know I can filter input later on, I just like to have my arguments typed)

Answer 1

2020 Update:

Union types have finally been implemented in PHP 8.0, which is due for release near the end of 2020.

They can be used like this:

class Number {
    private int|float $number;

    public function setNumber(int|float $number): void {
        $this->number = $number;
    }

    public function getNumber(): int|float {
        return $this->number;
    }
}

Answer 2

No, it is not possible.

Also, type hinting in PHP 5 is now only for classes and arrays. http://php.net/manual/en/language.oop5.typehinting.php

class Foo
{
}

function something(Foo $Object){}