mysqli预处理编译的深入理解

<?php
//创建连接
$mysqli=new mysqli("localhost","root","","test");
//设置mysqli编码
mysqli_query($mysqli,"SET NAMES utf8");
//检查连接是否被创建
if (mysqli_connect_errno()) {
printf("Connect failed:".mysqli_connect_error());
exit();
}
//创建准备语句
$stmt = $mysqli->prepare("select id,username from `user` where `id` > ?");
//
$id=5;
//绑定参数
$stmt->bind_param("i",$id);
//绑定结果集
$stmt->bind_result($id,$username);
//执行查询
$stmt->execute();
//显示绑定结果的变量
while($stmt->fetch()){
echo "第".$id."个用户 ".$username."<br />";
}
//
/.phpddt.为你提示上面之间的内容可以重复执行类似功能，不需要编译了/
//释放结果
$stmt->free_result();
//关闭编译语句
$stmt->close();
//关闭数据库的链接
$mysqli->close();
?>