Think\Db\Query::bind PHP Method

    public function bind($key, $value = false, $type = PDO::PARAM_STR)
    {
        if (is_array($key)) {
            $this->bind = array_merge($this->bind, $key);
        } else {
            $this->bind[$key] = [$value, $type];
        }
        return $this;
    }