/** * Wrap an unstructured header line * * Wrap at 78 characters or before, based on whitespace. * * @param string $value * @param HeaderInterface $header * @return string */ protected static function wrapUnstructuredHeader($value, HeaderInterface $header) { $encoding = $header->getEncoding(); if ($encoding == 'ASCII') { return wordwrap($value, 78, Headers::FOLDING); } return static::mimeEncodeValue($value, $encoding, 78); }