public static function Unicode::mimeHeaderDecode in Drupal 9

Same name and namespace in other branches

1. 8 core/lib/Drupal/Component/Utility/Unicode.php \Drupal\Component\Utility\Unicode::mimeHeaderDecode()

Decodes MIME/HTTP encoded header values.

Parameters

string $header: The header to decode.

Return value

string The mime-decoded header.

See also

https://www.drupal.org/node/3207439

1 call to Unicode::mimeHeaderDecode()

UnicodeTest::testMimeHeaderDecode in core/tests/Drupal/Tests/Component/Utility/UnicodeTest.php

Tests multibyte decoding.

File

core/lib/Drupal/Component/Utility/Unicode.php, line 438

Class

Unicode

Provides Unicode-related conversions and operations.

Namespace

Drupal\Component\Utility

Code

public static function mimeHeaderDecode($header) {
  @trigger_error('\\Drupal\\Component\\Utility\\Unicode::mimeHeaderDecode() is deprecated in drupal:9.2.0 and is removed from drupal:10.0.0. Use iconv_mime_decode() instead. See https://www.drupal.org/node/3207439', E_USER_DEPRECATED);
  $callback = function ($matches) {
    $data = strtolower($matches[2]) == 'b' ? base64_decode($matches[3]) : str_replace('_', ' ', quoted_printable_decode($matches[3]));
    if (strtolower($matches[1]) != 'utf-8') {
      $data = static::convertToUtf8($data, $matches[1]);
    }
    return $data;
  };

  // First step: encoded chunks followed by other encoded chunks (need to collapse whitespace)
  $header = preg_replace_callback('/=\\?([^?]+)\\?([Qq]|[Bb])\\?([^?]+|\\?(?!=))\\?=\\s+(?==\\?)/', $callback, $header);

  // Second step: remaining chunks (do not collapse whitespace)
  return preg_replace_callback('/=\\?([^?]+)\\?([Qq]|[Bb])\\?([^?]+|\\?(?!=))\\?=/', $callback, $header);
}