<?php

namespace GuzzleHttp\Psr7;

final class Rfc7230 {
	/**
	 * Header related regular expressions (copied from amphp/http package)
	 * (Note: once we require PHP 7.x we could just depend on the upstream package)
	 *
	 * Note: header delimiter (\r\n) is modified to \r?\n to accept line feed only delimiters for BC reasons.
	 *
	 * @link    https://github.com/amphp/http/blob/v1.0.1/src/Rfc7230.php#L12-L15
	 * @license https://github.com/amphp/http/blob/v1.0.1/LICENSE
	 */
	const HEADER_REGEX = "(^([^()<>@,;:\\\"/[\]?={}\x01-\x20\x7F]++):[ \t]*+((?:[ \t]*+[\x21-\x7E\x80-\xFF]++)*+)[ \t]*+\r?\n)m";
	const HEADER_FOLD_REGEX = "(\r?\n[ \t]++)";
}
