1<?php
2
3declare(strict_types=1);
4
5namespace GuzzleHttp\Psr7;
6
7/**
8 * @internal
9 */
10final class Rfc7230
11{
12    /**
13     * Header related regular expressions (based on amphp/http package)
14     *
15     * Note: header delimiter (\r\n) is modified to \r?\n to accept line feed only delimiters for BC reasons.
16     *
17     * @see https://github.com/amphp/http/blob/v1.0.1/src/Rfc7230.php#L12-L15
18     *
19     * @license https://github.com/amphp/http/blob/v1.0.1/LICENSE
20     */
21    public const HEADER_REGEX = "(^([^()<>@,;:\\\"/[\]?={}\x01-\x20\x7F]++):[ \t]*+((?:[ \t]*+[\x21-\x7E\x80-\xFF]++)*+)[ \t]*+\r?\n)m";
22    public const HEADER_FOLD_REGEX = "(\r?\n[ \t]++)";
23}
24