Same name in other branches

1. 9 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.

2 calls to Unicode::mimeHeaderDecode()

MailTest::testFromAndReplyToHeader in core/modules/system/tests/src/Kernel/Mail/MailTest.php

Checks the From: and Reply-to: headers.

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

Tests multibyte decoding.

File

core/lib/Drupal/Component/Utility/Unicode.php, line 538

Class

Unicode

Provides Unicode-related conversions and operations.

Namespace

Drupal\Component\Utility

Code

public static function mimeHeaderDecode($header) {
    $callback = function ($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);
}

---