Cml\Db\MySql\Pdo::prepare PHP Method

    public function prepare($sql, $link = null, $resetParams = true)
    {
        $resetParams && $this->reset();
        is_null($link) && ($link = $this->wlink);
        $sqlParams = [];
        foreach ($this->bindParams as $key => $val) {
            $sqlParams[] = ':param' . $key;
        }
        $this->currentSql = $sql;
        $sql = vsprintf($sql, $sqlParams);
        $stmt = $link->prepare($sql);
        //pdo默认情况prepare出错不抛出异常只返回Pdo::errorInfo
        if ($stmt === false) {
            $error = $link->errorInfo();
            throw new \InvalidArgumentException('Pdo Prepare Sql error! ,【Sql : ' . $this->buildDebugSql() . '】,【Code:' . $link->errorCode() . '】, 【ErrorInfo!:' . $error[2] . '】 <br />');
        } else {
            foreach ($this->bindParams as $key => $val) {
                is_int($val) ? $stmt->bindValue(':param' . $key, $val, \PDO::PARAM_INT) : $stmt->bindValue(':param' . $key, $val, \PDO::PARAM_STR);
            }
            return $stmt;
        }
        return false;
    }