QpMimeHeaderEncoder.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 QpMimeHeaderEncoder extends QpEncoder implements MimeHeaderEncoderInterface {
    protected function initSafeMap() : void {
        foreach (array_merge(range(0x61, 0x7a), range(0x41, 0x5a), range(0x30, 0x39), [
            0x20,
            0x21,
            0x2a,
            0x2b,
            0x2d,
            0x2f,
        ]) as $byte) {
            $this->safeMap[$byte] = \chr($byte);
        }
    }
    public function getName() : string {
        return 'Q';
    }
    public function encodeString(string $string, ?string $charset = 'utf-8', int $firstLineOffset = 0, int $maxLineLength = 0) : string {
        return str_replace([
            ' ',
            '=20',
            "=\r\n",
        ], [
            '_',
            '_',
            "\r\n",
        ], parent::encodeString($string, $charset, $firstLineOffset, $maxLineLength));
    }

}