1 <?php 2        //预编译演示 3        //需求: 请使用预处理的方式，向数据库添加三个用户 4        //1.创建mysqli对象 5        $mysqli=new MySQLi("localhost","root","hsp123","test"); 6        //2.创建预编译对象 7        $sql="insert into user1 (name,password,email,age) values(?,?,?,?)"; 8        $mysqli_stmt=$mysqli->prepare($sql) or die($mysqli->error); 9        //绑定参数10        $name="小倩";11        $password="xiaoqian";12        $email="aa@sohu.com";13        $age="200";14        //参数绑定->给?赋值,这里类型和顺序都要对应.15        //16        $mysqli_stmt->bind_param("sssi",$name,$password,$email,$age);17        //执行18        $b=$mysqli_stmt->execute();19       20        //继续添加21        $name="老妖";22        $password="laoyao";23        $email="laoyao@sohu.com";24        $age="210";25        $mysqli_stmt->bind_param("sssi",$name,$password,$email,$age);26        //执行27        $b=$mysqli_stmt->execute() ;28       29        //继续添加30        $name="菜层";31        $password="aaa";32        $email="aa@sohu.com";33        $age="30";34        $mysqli_stmt->bind_param("sssi",$name,$password,$email,$age);35        //执行36        $b=$mysqli_stmt->execute();37        if(!$b){38               die("操作失败".$mysqli_stmt->error);39        }else{40               echo "操作ok";41        }42        //释放43        $mysqli->close();44 ?>