help in bbcode code Correction

[bestman]

pls i want some one to help me correct this code pls

  private static function highlight_url($var)
    {
        if (!function_exists('process_url')) {
            function process_url($url)
            {
function page_title($url) {     $page = @file_get_contents($url);
if (empty($page)) return null;    $matches = array();
if (preg_match('/<title>(.*?)<\/title>/', $page, $matches))
{ 
return $matches[1];
}
else
{
return null;
}
}

                if (!isset($url[3])) {
                    $tmp = parse_url($url[1]);
                    if ('http://' . $tmp['host'] == core::$system_set['homeurl'] || isset(core::$user_set['direct_url']) && core::$user_set['direct_url']) {
                        return '<a href="' . $url[1] . '">' . $ptitle . '</a>';
                    } else {
                        return '<a href="' . core::$system_set['homeurl'] . '/go.php?url=' . base64_encode($url[1]) . '">' . $ptitle . '</a>';
                    }
                } else {
                    $tmp = parse_url($url[3]);
                    $url[3] = str_replace(':', ':', $url[3]);
                    if ('http://' . $tmp['host'] == core::$system_set['homeurl'] || isset(core::$user_set['direct_url']) && core::$user_set['direct_url']) {
                        return '<a href="' . $url[3] . '">' . $url[3] . '</a>';
                    } else {
                        return '<a href="' . core::$system_set['homeurl'] . '/go.php?url=' . base64_encode($url[3]) . '">' . $url[3] . '</a>';
                    }
                }
            }
        }
        return preg_replace_callback('~\\[url=(https?://.+?)\\](.+?)\\[/url\\]|(https?://(www.)?[0-9a-z\.-]+\.[0-9a-z]{2,6}[0-9a-zA-Z/\?\.\~&amp;_=/%-:#]*)~', 'process_url', $var);
    } 

Added after 6 minutes:

i was try to get the title of links posted in my forum but it gave me error,
pls ignore any rubbish i have done there

[something else]

your variables are all mis-matched names :/
there is a lot of the code missing?
...
this topic came up a few days ago and i think just_m3 solved it .... so probably better off using his code

[bestman]

pls, pls just help i am a newbie in php. What happened is this

this was the original code

 private static function highlight_url($var)
    {
        if (!function_exists('process_url')) {
            function process_url($url)
            {
                if (!isset($url[3])) {
                    $tmp = parse_url($url[1]);
                    if ('http://' . $tmp['host'] == core::$system_set['homeurl'] || isset(core::$user_set['direct_url']) && core::$user_set['direct_url']) {
                        return '<a href="' . $url[1] . '">' . $url[2] . '</a>';
                    } else {
                        return '<a href="' . core::$system_set['homeurl'] . '/go.php?url=' . base64_encode($url[1]) . '">' . $url[2] . '</a>';
                    }
                } else {
                    $tmp = parse_url($url[3]);
                    $url[3] = str_replace(':', ':', $url[3]);
                    if ('http://' . $tmp['host'] == core::$system_set['homeurl'] || isset(core::$user_set['direct_url']) && core::$user_set['direct_url']) {
                        return '<a href="' . $url[3] . '">' . $url[3] . '</a>';
                    } else {
                        return '<a href="' . core::$system_set['homeurl'] . '/go.php?url=' . base64_encode($url[3]) . '">' . $url[3] . '</a>';
                    }
                }
            }
        }
        return preg_replace_callback('~\\[url=(https?://.+?)\\](.+?)\\[/url\\]|(https?://(www.)?[0-9a-z\.-]+\.[0-9a-z]{2,6}[0-9a-zA-Z/\?\.\~&amp;_=/%-:#]*)~', 'process_url', $var);
    } 

Added after 3 minutes:

what it does is just to highlight the url in the forum so what i wanted is for it to also fetch the title of the highlighted url thats why i tried to use that file_get_contents, pls help