mybb nofollow plugin fixed

nofollow.php

<?php
// This plugin is licensed under the GNU GPLv3 license
if(!defined("IN_MYBB"))
{
    die("Direct initialization of this file is not allowed.");
}

$plugins->add_hook("parse_message_end", "AddNoFollow_hook");

function AddNoFollow_info() 
{
    // Inspired by http://mods.mybb.com/view/nofollowexternal
    return array(
        "name" => "AddNoFollow",
        "description" => "This is a simple plugin that puts rel=\"nofollow\" in external links",
        "website" => "",
        "author" => "Nixtren",
        "authorsite" => "https://github.com/Nixtren",
        "version" => "0.0.1",
        "guid"  => "",
        "compatibility" => "18*"
        );
}

function AddNoFollow_hook($message) 
{
    global $mybb;
    // Thanks to https://stackoverflow.com/questions/14573553/php-file-get-contents-replace-all-urls-in-all-a-href-links
    $match = array();
    $links = array();
    preg_match_all('!https?://[\S]+!', $message, $match);
    foreach ($match as $key => $value) foreach ($value as $key2 => $TheUrl) $links[] = $TheUrl;
    for ($i = 0; $i < count($links); $i++)
    {
        $linksurl = parse_url($links[$i]);
        $bburl = $mybb->settings['bburl'];
        if($linksurl['host'] != parse_url($bburl['host']))
        {
            $message = str_replace("<a href=\"{$links[$i]}", "<a rel=\"nofollow\" href=\"{$links[$i]}", $message);
        }
    }
    return $message;
}
?>