PHP e-commerce shopping cart (2: encapsulating database operation class)

                                                                                                   (Refer to the Mypdo written by the self-paid teacher, and attach a PDO summary after this article. in the learning summary module).

                                                            

<?php
/**
 * 自己封装的Pdo操作类
 * User: hangfu
 * Date: 2016-6-24
 * Time: 16:36
 * version: 1.0.0.1
 */

class MyPdo{
    /**
     * @var Pdo  私有的PDO对象
     */
    private $pdo;
    /**
     * 构造方法,用于初始化PDO对象
     */
    public function __construct(){

rrree       Configuration file (in the same directory file as the current class file)

        if(file_exists(_DIR_.'db.ini')){        
                  $ini = parse_ini_file('db.ini');
            $dsn = $ini['db'].":host=".$ini['host'].";dbname=".$ini['dbname'].";port=".$ini['host']
                .";charset=".$ini['charset'];
        }else{
            die('配置文件不存在....');
        }
        $this->pdo = new PDO($dsn, $ini['username'], $ini['userpwd']);
    }

    /**
     * 析构方法,用于销毁时同时销毁PDO对象
     */
    public function __destruct(){
        if($this->pdo)
            $this->pdo = null;
    }

    /**
     * 接收SQL(DML)语句并执行返回受影响的行数
     * @param $sql 传入的sql语句字符串
     */
    public function pdoExec($sql){
        return $this->pdo->exec($sql);
    }

    /**
     * 接收SQL(DQL)语句,该语句不带参数,执行并返回查询结果,返回的值为二维数组;如果没有结果,返回null
     * @param $sql 传入的sql语句字符串
     */
    public function pdoQuery($sql){
        $data = $this->pdo->query($sql);
        if($data){
            return $data->fetchAll(PDO::FETCH_NUM);
        }else{
            return null;
        }
    }
    /**
     * 接收SQL(DQL)语句,该语句不带参数,执行并返回查询结果,返回的值为二维数组;如果没有结果,返回null
     * @param $sql 传入的sql语句字符串
     * @param $objname 传入的对象名称,字符串格式
     */
    public function pdoQueryByObj($sql, $objname){
        $data = $this->pdo->query($sql);
        if($data){
            $datalist = array();
            while($info=$data->fetchObject($objname)){
                array_push($datalist, $info);
            }
            return $datalist;
        }else{
            return null;
        }
    }
    /**
     * 接收SQL(DQL)语句,该语句带参数,执行并返回查询结果,返回的值为二维数组;如果没有结果,返回null
     * @param $sql 传入的sql语句字符串
     * @param $arr 传入的参数值,数组格式
     */
    public function pdoPrepare($sql, $arr){
        $data = $this->pdo->prepare($sql);
        $bl = $data->execute($arr);
        if($bl){
            return $data->fetchAll(PDO::FETCH_NUM);
        }else{
            return null;
        }
    }
    /**
     * 接收SQL(DQL)语句,该语句不带参数,执行并返回查询结果,返回的值为二维数组;如果没有结果,返回null
     * @param $sql 传入的sql语句字符串
     * @param $objname 传入的对象名称,字符串格式
     * @param $arr 传入的参数值,数组格式
     */
    public function pdoPrepareByObj($sql, $objname, $arr){
        $data = $this->pdo->prepare($sql);
        $bl = $data->execute($arr);
        if($bl){
            $datalist = array();
            while($info=$data->fetchObject($objname)){
                array_push($datalist, $info);
            }
            return $datalist;
        }else{
            return null;
        }
    }
}

 

                                                                                 

###数据库类型
db=mysql
###数据库名称
dbname=phpwork
###服务器地址或名称
host=localhost
###数据库字符集
charset=utf8
###数据库端口号
port=3306
###操作的用户名
username=xuzhengyang
###操作的用户密码
userpwd=

rrree           configuration file (in the same directory file as the current class file) rrreee                                             

The above has introduced the PHP e-commerce shopping cart (Part 2: Encapsulating database operation class), including aspects of the content. I hope it will be helpful to friends who are interested in PHP tutorials.