Namshi\JOSE\SimpleJWS::isValid PHP Метод

Checks that the JWS has been signed with a valid private key by verifying it with a public $key and the token is not expired.

public isValid ( resource \| string $key, string $algo = null ) : boolean
$key	resource \| string
$algo	string	The algorithms this JWS should be signed with. Use it if you want to restrict which algorithms you want to allow to be validated.
Результат	boolean

    public function isValid($key, $algo = null)
    {
        return $this->verify($key, $algo) && !$this->isExpired();
    }

SimpleJWS