ext/uri: Percent-encoding of caret in WHATWG URL paths is not performed

[JKingweb]

Description

The following code:

<?php
$url = new Uri\WhatWg\Url("https://example.com/^");
var_dump($url->getPath());

Resulted in this output:

string(2) "/^"

But I expected this output instead:

string(4) "/%5E"

The URL standard states:

The path percent-encode set is a percent-encode set consisting of the query percent-encode set and U+003F (?), U+005E (^), U+0060 (`), U+007B ({), and U+007D (}).

This is tested in two (incorrect) tests: whatwg/parsing/path_success_percent_encode_set2.phpt and whatwg/modification/path_success_auto_encoded.phpt.

PHP Version

PHP 8.5.8 (cli) (built: Jul  1 2026 16:35:50) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.5.8, Copyright (c) Zend Technologies
    with Zend OPcache v8.5.8, Copyright (c), by Zend Technologies

Operating System

Arch Linux