HtmlDiff::getStringBetween PHP Метод

    private function getStringBetween($str, $start, $end)
    {
        $expStr = explode($start, $str, 2);
        if (count($expStr) > 1) {
            $expStr = explode($end, $expStr[1]);
            if (count($expStr) > 1) {
                array_pop($expStr);
                return implode($end, $expStr);
            }
        }
        return '';
    }