private function parseHeader(string $data): array
    {
        $header = $this->decoder->jsonDecode($this->decoder->base64UrlDecode($data));

        if (! is_array($header)) {
            throw new InvalidArgumentException('Headers must be an array');
        }

        if (isset($header['enc'])) {
            throw new InvalidArgumentException('Encryption is not supported yet');
        }

        if (! isset($header['typ'])) {
            throw new InvalidArgumentException('The header "typ" must be present');
        }

        return $header;
    }
private function parseHeader(string $data): array
    {
        $header = $this->decoder->jsonDecode($this->decoder->base64UrlDecode($data));

        if (! is_array($header)) {
            throw new InvalidArgumentException('Headers must be an array');
        }

        if (isset($header['enc'])) {
            throw new InvalidArgumentException('Encryption is not supported yet');
        }

        if (! isset($header['typ'])) {
            throw new InvalidArgumentException('The header "typ" must be present');
        }

        return $header;
    }
private function parseHeader ( string $ data ) : array { $ header = $ this -> decoder -> jsonDecode ( $ this -> decoder -> base64UrlDecode ( $ data ) ) ; if ( ! is_array ( $ header ) ) { throw new InvalidArgumentException ( 'Headers must be an array' ) ; } if ( isset ( $ header [ 'enc' ] ) ) { throw new InvalidArgumentException ( 'Encryption is not supported yet' ) ; } if ( ! isset ( $ header [ 'typ' ] ) ) { throw new InvalidArgumentException ( 'The header "typ" must be present' ) ; } return $ header ; }
Parses the header from a string

@return mixed[]

@throws InvalidArgumentException When an invalid header is informed.
Parses the header from a string