Jose\Object\JWKSetPEM::toPEM PHP Method

    public function toPEM()
    {
        $keys = $this->getKeys();
        $result = [];
        foreach ($keys as $key) {
            if (!in_array($key->get('kty'), ['RSA', 'EC'])) {
                continue;
            }
            $pem = $this->getPEM($key);
            if ($key->has('kid')) {
                $result[$key->get('kid')] = $pem;
            } else {
                $result[] = $pem;
            }
        }
        return $result;
    }