# wordpress-seo/28.2/vendor_prefixed/guzzlehttp/psr7/src/Rfc3986.php

Yoast SEO – Advanced SEO with real-time guidance and built-in AI, version 28.2. 24 lines.

- Page: https://pluginprobe.com/plugins/wordpress-seo/28.2/code/vendor_prefixed/guzzlehttp/psr7/src/Rfc3986.php
- Raw: https://pluginprobe.com/plugins/wordpress-seo/28.2/raw/vendor_prefixed/guzzlehttp/psr7/src/Rfc3986.php
- Modified: 2026-06-23T11:22:06+00:00

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```php
<?php

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

/**
 * @internal
 */
final class Rfc3986
{
    /**
     * Sub-delims for use in a regex.
     *
     * @see https://datatracker.ietf.org/doc/html/rfc3986#section-2.2
     */
    public const CHAR_SUB_DELIMS = '!\\$&\'\\(\\)\\*\\+,;=';
    /**
     * Unreserved characters for use in a regex.
     *
     * @see https://datatracker.ietf.org/doc/html/rfc3986#section-2.3
     */
    public const CHAR_UNRESERVED = 'a-zA-Z0-9_\\-\\.~';
}

```