Php Mysql PDO

 
<?php
header("Content-type:text/html; charset=utf8");
  
class Mysql{
    protected $mysql;
      
    function __construct(){
        $this->mysql=new PDO("mysql:host=localhost;dbname=mytest","root","root");
        if(!$this->mysql) { throw new Exception("Can't connect to Mysql");exit(0);}
          
        $this->mysql->query("set names utf8");
    }
      
    function  getItem($id){
        $result=$this->mysql->prepare("select * from table01 where id=:id");
        $result->bindParam(':id',$id,PDO::PARAM_INT);        //bindValue:不接受php参数
        $result->execute();
          
        $resultArray=array();
        while($row=$result->fetch(PDO::FETCH_ASSOC)){
            array_push($resultArray,array($row['number'],$row['name']));
        }
          
        return $resultArray;
    }
      
    function removeItem($name){
        $delete=$this->mysql->prepare("delete from table01 where name=:name");
        $delete->bindParam(':name',$name,PDO::PARAM_STR);
        $delete->execute();
          
        if($delete) return true;
        else return false;
    }
      
    function addItem($number,$name){
        $insert=$this->mysql->prepare("insert into table01(number,name) values (:number,:name)");
        $insert->bindParam(':number',$number,PDO::PARAM_INT);
        $insert->bindParam(':name',$name,PDO::PARAM_STR);
        $insert->execute();
          
        if($insert) return true;
        else return false;
    }
}
try{
    $mysql=new Mysql();
    //添加条目
    if($mysql->addItem(5,"five")) echo "addItem(5,'five') is success<br>";
    else echo "addItem(5,'five') is wrong<br>";
      
    //删除条目
    if($mysql->removeItem("five")) echo "removeItem('five') is success<br>";
    else echo "removeItem('five') is wrong<br>";
      
    //查找条目
    $result=$mysql->getItem(1);
    echo $result[0][0]."<br>".$result[0][1];
      
}catch(Exception $e){
    echo $e->getMessage()."<br>";
}