# wordpress-seo/27.7/vendor_prefixed/guzzlehttp/psr7/src/Rfc7230.php

Yoast SEO – Advanced SEO with real-time guidance and built-in AI, version 27.7. 23 lines.

- Page: https://pluginprobe.com/plugins/wordpress-seo/27.7/code/vendor_prefixed/guzzlehttp/psr7/src/Rfc7230.php
- Raw: https://pluginprobe.com/plugins/wordpress-seo/27.7/raw/vendor_prefixed/guzzlehttp/psr7/src/Rfc7230.php
- Modified: 2023-09-19T09:07:18+00:00

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```php
<?php

declare (strict_types=1);
namespace YoastSEO_Vendor\GuzzleHttp\Psr7;

/**
 * @internal
 */
final class Rfc7230
{
    /**
     * Header related regular expressions (based on amphp/http package)
     *
     * Note: header delimiter (\r\n) is modified to \r?\n to accept line feed only delimiters for BC reasons.
     *
     * @see 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
     */
    public const HEADER_REGEX = "(^([^()<>@,;:\\\"/[\\]?={}\x01- ]++):[ \t]*+((?:[ \t]*+[!-~\x80-\xff]++)*+)[ \t]*+\r?\n)m";
    public const HEADER_FOLD_REGEX = "(\r?\n[ \t]++)";
}

```