PHP: Replace CURL's Default exec_follow

PHP: Replace CURL's Default exec_follow

// REPLACE CURL'S DEFAULT exec_follow
function curlExecFollow($ch, &$maxredirect = null)
{
    // we emulate a browser here since some websites detect
    // us as a bot and don't let us do our job
    $user_agent = "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.5)"." Gecko/20041107 Firefox/1.0";
    curl_setopt($ch, CURLOPT_USERAGENT, $user_agent);

    $mr = $maxredirect === null ? 5 : intval($maxredirect);

    if (filter_var(ini_get(‘open_basedir’), FILTER_VALIDATE_BOOLEAN) === false && filter_var(ini_get(‘safe_mode’), FILTER_VALIDATE_BOOLEAN) === false) {
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, $mr > 0);
        curl_setopt($ch, CURLOPT_MAXREDIRS, $mr);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    } else {
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false);

        if ($mr > 0) {
            $original_url = curl_getinfo($ch, CURLINFO_EFFECTIVE_URL);
            $newurl = $original_url;

            $rch = curl_copy_handle($ch);

            curl_setopt($rch, CURLOPT_HEADER, true);
            curl_setopt($rch, CURLOPT_NOBODY, true);
            curl_setopt($rch, CURLOPT_FORBID_REUSE, false);
            do {
                curl_setopt($rch, CURLOPT_URL, $newurl);
                $header = curl_exec($rch);
                if (curl_errno($rch)) {
                    $code = 0;
                } else {
                    $code = curl_getinfo($rch, CURLINFO_HTTP_CODE);
                    if ($code == 301 || $code == 302) {
                        preg_match('/Location:(.*?)\n/i', $header, $matches);
                        $newurl = trim(array_pop($matches));

                        // if no scheme is present then the new url is a
                        // relative path and thus needs some extra care
                        if (!preg_match("/^https?:/i", $newurl)) {
                            $newurl = $original_url.$newurl;
                        }
                    } else {
                        $code = 0;
                    }
                }
            } while ($code && --$mr);

            curl_close($rch);

            if (!$mr) {
                if ($maxredirect === null) {
                    trigger_error('Too many redirects.', E_USER_WARNING);
                } else {
                    $maxredirect = 0;
                }

                return false;
            }
            curl_setopt($ch, CURLOPT_URL, $newurl);
        }
    }

    return curl_exec($ch);
}