name : Base64MimeHeaderEncoder.php <?php /* * This file is part of the Symfony package. * * (c) Fabien Potencier <fabien@symfony.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\Mime\Encoder; /** * @author Chris Corbyn */ final class Base64MimeHeaderEncoder extends Base64Encoder implements MimeHeaderEncoderInterface { public function getName(): string { return 'B'; } /** * Takes an unencoded string and produces a Base64 encoded string from it. * * If the charset is iso-2022-jp, it uses mb_encode_mimeheader instead of * default encodeString, otherwise pass to the parent method. */ public function encodeString(string $string, ?string $charset = 'utf-8', int $firstLineOffset = 0, int $maxLineLength = 0): string { if ('iso-2022-jp' === strtolower($charset)) { $old = mb_internal_encoding(); mb_internal_encoding('utf-8'); $newstring = mb_encode_mimeheader($string, 'iso-2022-jp', $this->getName(), "\r\n"); mb_internal_encoding($old); return $newstring; } return parent::encodeString($string, $charset, $firstLineOffset, $maxLineLength); } }