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+1.Mysql中新建个student数据库，里面有个学生信息表user，表结构和内容如下
+
+2.完成PHP访问数据库五步。使用mysqli扩展对mysql数据库中的学生信息表进行增删改查。
+
+3.交作业时，要把mysql相关代码和php一起提交
+
+```php
+DROP DATABASE IF EXISTS WakeUp;
+CREATE DATABASE WakeUp charset utf8;
+USE WakeUp;
+
+CREATE TABLE Users(
+	uid INT PRIMARY KEY auto_increment,
+	uname VARCHAR(20) NOT NULL,
+	uscore DECIMAL(3,1) NOT NULL
+);
+<?php
+/**
+
+ * Created by PhpStorm.
+ * User: Administrator
+ * Date: 2022/5/23
+ * Time: 9:48
+   */
+
+$sql = mysqli_connect('127.0.0.1','root','123456','WakeUp') or die('连接失败：'.mysqli_connect_error());
+// 增加数据
+$A = " insert into `Users`(`uname`,`uscore`) values ('陈小龙',98.5),('吴大虫',75.5),('陈得胜',66)";
+mysqli_query($sql,$A);
+// 删除数据
+$B = " delete from Users where uid = 1 or uname='吴大虫' ";
+mysqli_query($sql,$B);
+// 修改数据
+$C = " update Users set uname = '逗粒养', uscore = 88 where uid=3 ";
+mysqli_query($sql,$C);
+// 查询数据
+$D = "select uname from Users ";
+mysqli_query($sql,$D);
+```
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