wpide / vendor / symfony / mime / Encoder / QpContentEncoder.php

QpContentEncoder.php in WPIDE – File Manager & Code Editor 3.5.9, at vendor/symfony/mime/Encoder/QpContentEncoder.php

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1	<?php
2
3	/*
4	* This file is part of the Symfony package.
5	*
6	* (c) Fabien Potencier <fabien@symfony.com>
7	*
8	* For the full copyright and license information, please view the LICENSE
9	* file that was distributed with this source code.
10	*/
11
12	namespace Symfony\Component\Mime\Encoder;
13
14	/**
15	* @author Lars Strojny
16	*/
17	final class QpContentEncoder implements ContentEncoderInterface
18	{
19	public function encodeByteStream($stream, int $maxLineLength = 0): iterable
20	{
21	if (!\is_resource($stream)) {
22	throw new \TypeError(sprintf('Method "%s" takes a stream as a first argument.', __METHOD__));
23	}
24
25	// we don't use PHP stream filters here as the content should be small enough
26	yield $this->encodeString(stream_get_contents($stream), 'utf-8', 0, $maxLineLength);
27	}
28
29	public function getName(): string
30	{
31	return 'quoted-printable';
32	}
33
34	public function encodeString(string $string, ?string $charset = 'utf-8', int $firstLineOffset = 0, int $maxLineLength = 0): string
35	{
36	return $this->standardize(quoted_printable_encode($string));
37	}
38
39	/**
40	* Make sure CRLF is correct and HT/SPACE are in valid places.
41	*/
42	private function standardize(string $string): string
43	{
44	// transform CR or LF to CRLF
45	$string = preg_replace('~=0D(?!=0A)\|(?<!=0D)=0A~', '=0D=0A', $string);
46	// transform =0D=0A to CRLF
47	$string = str_replace(["\t=0D=0A", ' =0D=0A', '=0D=0A'], ["=09\r\n", "=20\r\n", "\r\n"], $string);
48
49	switch (\ord(substr($string, -1))) {
50	case 0x09:
51	$string = substr_replace($string, '=09', -1);
52	break;
53	case 0x20:
54	$string = substr_replace($string, '=20', -1);
55	break;
56	}
57
58	return $string;
59	}
60	}
61