Emarref\Jwt\Token::getHeader PHP Method

    public function getHeader()
    {
        return $this->header;
    }

 public function getUnsignedValue(Token $token)
 {
     $jsonHeader = $token->getHeader()->getParameters()->jsonSerialize();
     $encodedHeader = $this->encoder->encode($jsonHeader);
     $jsonPayload = $token->getPayload()->getClaims()->jsonSerialize();
     $encodedPayload = $this->encoder->encode($jsonPayload);
     return sprintf('%s.%s', $encodedHeader, $encodedPayload);
 }