getNextBytes(2); // skip info block $this->getNextBytes($this->getInfoBlockSize()); // text blocks $extension->setText($this->decodeTextBlocks()); return $extension; } /** * Get number of bytes in header block * * @return int */ protected function getInfoBlockSize(): int { return unpack('C', $this->getNextByte())[1]; } /** * Decode text sub blocks * * @return array */ protected function decodeTextBlocks(): array { $blocks = []; do { $char = $this->getNextByte(); $size = (int) unpack('C', $char)[1]; if ($size > 0) { $blocks[] = $this->getNextBytes($size); } } while ($char !== PlainTextExtension::TERMINATOR); return $blocks; } }