3 * Zend Framework (http://framework.zend.com/)
5 * @link http://github.com/zendframework/zf2 for the canonical source repository
6 * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
7 * @license http://framework.zend.com/license/new-bsd New BSD License
10 namespace Zend\Mail\Header
;
12 use Zend\Mail\Headers
;
16 * Utility class used for creating wrapped or MIME-encoded versions of header
19 abstract class HeaderWrap
22 * Wrap a long header line
24 * @param string $value
25 * @param HeaderInterface $header
28 public static function wrap($value, HeaderInterface
$header)
30 if ($header instanceof UnstructuredInterface
) {
31 return static::wrapUnstructuredHeader($value, $header);
32 } elseif ($header instanceof StructuredInterface
) {
33 return static::wrapStructuredHeader($value, $header);
39 * Wrap an unstructured header line
41 * Wrap at 78 characters or before, based on whitespace.
43 * @param string $value
44 * @param HeaderInterface $header
47 protected static function wrapUnstructuredHeader($value, HeaderInterface
$header)
49 $encoding = $header->getEncoding();
50 if ($encoding == 'ASCII') {
51 return wordwrap($value, 78, Headers
::FOLDING
);
53 return static::mimeEncodeValue($value, $encoding, 78);
57 * Wrap a structured header line
59 * @param string $value
60 * @param StructuredInterface $header
63 protected static function wrapStructuredHeader($value, StructuredInterface
$header)
65 $delimiter = $header->getDelimiter();
67 $length = strlen($value);
70 for ($i = 0; $i < $length; $i++
) {
72 if ($value[$i] == $delimiter) {
77 return implode(Headers
::FOLDING
, $lines);
83 * Performs quoted-printable encoding on a value, setting maximum
86 * @param string $value
87 * @param string $encoding
88 * @param int $lineLength maximum line-length, by default 998
89 * @return string Returns the mime encode value without the last line ending
91 public static function mimeEncodeValue($value, $encoding, $lineLength = 998)
93 return Mime
::encodeQuotedPrintableHeader($value, $encoding, $lineLength, Headers
::EOL
);
99 * Performs quoted-printable decoding on a value.
101 * @param string $value
102 * @return string Returns the mime encode value without the last line ending
104 public static function mimeDecodeValue($value)
106 $decodedValue = iconv_mime_decode($value, ICONV_MIME_DECODE_CONTINUE_ON_ERROR
, 'UTF-8');
108 return $decodedValue;
112 * Test if is possible apply MIME-encoding
114 * @param string $value
117 public static function canBeEncoded($value)
119 $encoded = iconv_mime_encode('x-test', $value, array('scheme' => 'Q'));
121 return (false !== $encoded);