/**
* 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);
}