Doctrine\DBAL\Logging\MonologSQLLogger::startQuery PHP Method

    public function startQuery($sql, array $params = null, array $types = null)
    {
        $this->start = microtime(true);
        $this->sql = preg_replace_callback("/\\?/", function ($matches) use(&$params, &$types) {
            $param = array_shift($params);
            if (null === $param) {
                return "NULL";
            } else {
                return "'" . $param . "'";
            }
        }, $sql);
    }