php 面向对象的方式访问数据库

<?php
$uid = $_POST["uid"];
$pwd = $_POST["pwd"];
$name = $_POST["name"];
$sex = $_POST["sex"];
$birthday = $_POST["birthday"];

$s = $sex==1?true:false;

//造对象
$db = new MySQLi("localhost","root","123","mydb");

//判断是否出错
!mysqli_connect_error() or die("连接失败！");

//写SQL语句
$sql = "insert into Users values('{$uid}','{$pwd}','{$name}',{$s},'{$birthday}',0)";

//执行SQL语句
$result = $db->query($sql);

if($result)
{
header("location:zhuce.php");
}
else
{
echo "注册失败！";
}