1、使用mysqli扩展库 预处理技术 mysqli stmt 向数据库添加3个用户

复制代码 代码如下:

<?php

//mysqli扩展库 预处理技术 mysqli stmt 向数据库添加3个用户

//1、创建mysqli对象

$mysqli = new MySQLi("localhost","root","root","test");

if($mysqli->connect_error){

die($mysqli->conncet_error);

}

//2、创建预编译对象

$sql="insert into user1(name,password,email,age) values(?,?,?,?)";

$mysqli_stmt=$mysqli->prepare($sql);

//绑定参数

$name="小芳";

$password="123456";

$email="xiaofang@126.com";

$age=18;

//参数绑定->给？号赋值 这里类型和顺序要一致

$mysqli_stmt->bind_param("sssi",$name,$password,$email,$age);

//执行

$b=$mysqli_stmt->execute();

//继续添加

$name="小杨";

$password="123456";

$email="xiaoyang@126.com";

$age=18;

//参数绑定->给？号赋值 这里类型和顺序要一致

$mysqli_stmt->bind_param("sssi",$name,$password,$email,$age);

//执行

$b=$mysqli_stmt->execute();

//继续添加

$name="小G";

$password="123456";

$email="xiaoG@126.com";

$age=18;

//参数绑定->给？号赋值 这里类型和顺序要一致

$mysqli_stmt->bind_param("sssi",$name,$password,$email,$age);

//执行

$b=$mysqli_stmt->execute();

if(!$b){

echo "操作失败".$mysqli_stmt->error;

}else{

echo "操作成功";

}

//关闭预编译

$mysqli_stmt->close();

$mysqli->close();

?>

2、使用预处理查询id>5的用户id name email

复制代码 代码如下:

<?php

//使用预处理查询id>5的用户id name email

$mysqli=new MySQLi("localhost","root","root","test");

if($mysqli->connect_error){

die($mysqli->connect_error);

}

//创建预编译对象

$sql="select id,name,email from user1 where id>?";

$mysqli_stmt=$mysqli->prepare($sql);

$id=5;

//绑定参数

$mysqli_stmt->bind_param("i",$id);

//绑定结果集

$mysqli_stmt->bind_result($id,$name,$email);

//执行

$mysqli_stmt->execute();

//取出绑定的值

while($mysqli_stmt->fetch()){

echo "<br/>$id--$name--$email";

}

//关闭资源

//释放结果

$mysqli_stmt->free_result();

//关闭与编译语句

$mysqli_stmt->close();

//关闭连接

$mysqli->close();

?>