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<?php

/**
 * Part of the Joomla Framework Uri Package
 *
 * @copyright  Copyright (C) 2005 - 2022 Open Source Matters, Inc. All
rights reserved.
 * @license    GNU General Public License version 2 or later; see LICENSE
 */

namespace Joomla\Uri;

/**
 * Uri Helper
 *
 * This class provides a UTF-8 safe version of parse_url().
 *
 * @since  1.0
 */
class UriHelper
{
    /**
     * Does a UTF-8 safe version of PHP parse_url function
     *
     * @param   string   $url        URL to parse
     * @param   integer  $component  Retrieve just a specific URL component
     *
     * @return  array|boolean  Associative array or false if badly formed
URL.
     *
     * @link    https://www.php.net/manual/en/function.parse-url.php
     * @since   1.0
     */
    public static function parse_url($url, $component = -1)
    {
        $result = [];

        // If no UTF-8 chars in the url just parse it using php native
parse_url which is faster.
        if (extension_loaded('mbstring') &&
mb_convert_encoding($url, 'ISO-8859-1', 'UTF-8') ===
$url) {
            return parse_url($url, $component);
        }

        // URL with UTF-8 chars in the url.

        // Build the reserved uri encoded characters map.
        $reservedUriCharactersMap = [
            '%21' => '!',
            '%2A' => '*',
            '%27' => "'",
            '%28' => '(',
            '%29' => ')',
            '%3B' => ';',
            '%3A' => ':',
            '%40' => '@',
            '%26' => '&',
            '%3D' => '=',
            '%24' => '$',
            '%2C' => ',',
            '%2F' => '/',
            '%3F' => '?',
            '%23' => '#',
            '%5B' => '[',
            '%5D' => ']',
        ];

        // Encode the URL (so UTF-8 chars are encoded), revert the encoding
in the reserved uri characters and parse the url.
        $parts = parse_url(strtr(urlencode($url),
$reservedUriCharactersMap), $component);

        // With a well formed url decode the url (so UTF-8 chars are
decoded).
        return $parts ? array_map('urldecode', $parts) : $parts;
    }
}