PHPmysqli的 预处理执行插入语句

<?php
//预编译技术
//1.创建一个mysqli对象
//2.创建myslqi预编译对象
$mysqli=new mysqli("localhost", "root", "root", "user1", 3306);
$mysqli->set_charset("utf8");

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

$mysqli_stmt=$mysqli->prepare($sql) or die($mysqli->error);
//绑定参数
$name="小李";
$password="tsts";
$email="sohu@sohu.cn";
$age="200";
//参数绑定  赋值
$mysqli_stmt->bind_param("sssi", $name,$password,$email,$age);
//执行
$result=$mysqli_stmt->execute();
if(!$result){
//echo $mysqli->error;
die($mysqli_stmt->error);
error_log($result);
}
$name="小王";
$password="5678";
$email="sohu2@sohu.cn";
$age="20";
$mysqli_stmt->bind_param("sssi", $name,$password,$email,$age);
//执行
$result=$mysqli_stmt->execute();

$mysqli->close();

?>