From b83c0319bbb6eff032c3e8b4fef47bd484fdff56 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=8F=B6=E6=80=9D=E6=80=9D?= <3242902095@qq.com>
Date: Sun, 29 May 2022 19:46:11 +0800
Subject: [PATCH] =?UTF-8?q?=E6=8F=90=E4=BA=A4?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 ...73\347\273\237\345\212\240\345\274\272.md" | 347 ++++++++++++++++++
 1 file changed, 347 insertions(+)
 create mode 100644 "\345\217\266\346\200\235\346\200\235/20220525-\345\255\246\347\224\237\344\277\241\346\201\257\347\263\273\347\273\237\345\212\240\345\274\272.md"
diff --git "a/\345\217\266\346\200\235\346\200\235/20220525-\345\255\246\347\224\237\344\277\241\346\201\257\347\263\273\347\273\237\345\212\240\345\274\272.md" "b/\345\217\266\346\200\235\346\200\235/20220525-\345\255\246\347\224\237\344\277\241\346\201\257\347\263\273\347\273\237\345\212\240\345\274\272.md"
new file mode 100644
index 0000000..63f7728
--- /dev/null
+++ "b/\345\217\266\346\200\235\346\200\235/20220525-\345\255\246\347\224\237\344\277\241\346\201\257\347\263\273\347\273\237\345\212\240\345\274\272.md"
@@ -0,0 +1,347 @@
+```mysql
+-- mysql代码
+create database student charset utf8;
+use student;
+
+create table user(
+id int primary key auto_increment,
+name varchar(20) not null,
+score decimal(5,2) not null
+);
+```
+
+conn.php连接
+
+```php
+<?php
+error_reporting(E_ALL ^ E_WARNING);
+// 连服务器
+$conn =mysqli_connect('localhost','root','root','student') or die("服务器连接失败！");
+// 设置字符utf8
+mysqli_query($conn,'set names utf8');
+```
+
+loginindex.php登录首页
+
+```php+HTML
+<?php
+session_start();
+$user=$_SESSION['username']?:$_COOKIE['username'];
+if (isset($user)&&$user=="admin"){
+    echo "学生系统首页欢迎您";
+    echo "<br>";
+    echo "<a href='logout.php'>注销</a>";
+}else{
+    die("您还未登录！<a href='login.html'>马上去登录</a>");
+}
+```
+
+login.html
+
+```php+HTML
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Title</title>
+</head>
+<body>
+<h1>登录界面</h1>
+<form action="login.php" method="post">
+    <table border="1">
+        <tr>
+            <td>用户名</td><td><input type="text" name="username"></td>
+        </tr>
+        <tr><td>密码</td><td><input type="password" name="password"></td>
+        </tr>
+        <tr>
+            <td></td><td><input type="checkbox" name="auto" value="yes">7天内自动登录</td>
+        </tr>
+        <tr>
+            <td><input type="submit" value="登录"></td>
+        </tr>
+    </table>
+</form>
+</body>
+</html>
+```
+
+login.php
+
+```php+HTML
+<?php
+/**
+ * Created by PhpStorm.
+ * User: Administrator
+ * Date: 2022/5/27
+ * Time: 20:23
+ */
+session_start();
+$username='admin';
+$password='123456';
+if ($_POST['username']==$username && $_POST['password']==$password){
+    echo "登录成功!";
+    echo " <br> <a href='index.php'>进入学生系统首页</a>";
+    $_SESSION['username']=$username;
+    if ($_POST['auto']=='yes'){
+        setcookie('username',"admin",time()+60*60*24*7);
+    }
+    echo "<a href='index.php'></a>";
+}else{
+    die("登录失败！");
+    echo "<a>返回</a>";
+}
+```
+
+logout.php 注销
+
+```php+HTML
+<?php
+session_start();
+unset($_SESSION['username']);
+setcookie('username','',time()-1);
+echo "账号注销成功 <br> <a href='login.html'>返回登录界面</a>";
+```
+
+index.php 学生信息系统首页
+
+```php+HTML
+<?php
+/**
+ * Created by PhpStorm.
+ * User: Administrator
+ * Date: 2022/5/25
+ * Time: 10:33
+ */
+include_once('conn.php');
+$sql="select * from `user`";
+$conn=mysqli_connect('localhost','root','root','student');
+$result= mysqli_query($conn,$sql);
+
+?>
+<html>
+<head>
+    <meta charset="utf-8">
+    <title>学生信息系统</title>
+    <script>
+        function del(){
+            if(!window.confirm("确定要删除吗？")){
+                return false;
+            }
+        }
+    </script>
+</head>
+<body>
+<h1>学生信息系统</h1>
+<table border="1" width="300">
+    <tr>
+        <th>学生姓名</th>
+        <th>学生分数</th>
+        <th>操作</th>
+    </tr>
+    <?php
+    if (!mysqli_num_rows($result)){
+        echo "<tr align='center'><td colspan='5'>暂无数据！</td></tr>";
+    }else{
+        while ($row=mysqli_fetch_assoc($result)){
+            ?>
+    <tr>
+
+        <td><?php echo $row['name'] ?></td>
+        <td><?php echo $row['score'] ?></td>
+        <td><a href="edit.php?id=<?php echo $row['id'] ?>">修改</a>|
+            <a href="delete.php?id=<?php echo $row['id'] ?>" onclick="return del();">删除</a></td>
+
+    </tr>
+    <?php
+        }
+    }
+    ?>
+</table>
+<a href="add.php">添加学生</a>
+</body>
+</html>
+
+```
+
+add.php
+
+```php+HTML
+<?php
+/**
+ * Created by PhpStorm.
+ * User: Administrator
+ * Date: 2022/5/25
+ * Time: 11:00
+ */
+?>
+<html>
+<head>
+    <meta charset="utf-8">
+    <title>添加学生信息</title>
+</head>
+<body>
+<h1>添加学生信息</h1>
+<form action="save.php" method="post">
+<table border="1" width="300">
+    <tr>
+        <th>学生姓名</th><td><input type="text" name="name"></td>
+    </tr>
+    <tr>
+        <th>学生成绩</th><td><input type="text" name="score"></td>
+    </tr>
+    <tr>
+        <td colspan="2" align="center"><input type="submit" name='submit' value="提交">
+            &nbsp;&nbsp;&nbsp;&nbsp; <input type="reset" value="取消"></td>
+    </tr>
+</table>
+<a href="index.php">返回</a>
+</form>
+</body>
+</html>
+```
+
+save.php
+
+```php
+<?php
+/**
+ * Created by PhpStorm.
+ * User: Administrator
+ * Date: 2022/5/25
+ * Time: 11:16
+ */
+include_once('conn.php');
+
+if(!isset($_POST['submit'])){
+    die("非法访问！");
+}
+$name=$_POST['name'];
+$score=$_POST['score'];
+$sql = "insert into `user` (`name`,`score`) values ('$name','$score')";
+$conn=mysqli_connect('localhost','root','root','student');
+$res=mysqli_query($conn,$sql);
+if ($res){
+    echo "添加成功！<a href='./index.php'>返回首页</a>";
+}else{
+    echo "添加失败！";
+}
+```
+
+edit.php
+
+```php+HTML
+<?php
+include_once ("./conn.php");
+if(!isset($_GET['id'])){
+    die("非法访问！");
+}
+$id=$_GET['id'];
+
+$sql = "select * from `user` where `id`=$id";// 从数据库查询id为$book_id的数据
+$conn=mysqli_connect('localhost','root','root','student');
+$result = mysqli_query($conn,$sql);
+$row = mysqli_fetch_assoc($result);
+?>
+<html>
+<head>
+    <title>修改学生信息</title>
+
+</head>
+<h1>修改学生信息</h1>
+<form action="update.php" method="post">
+    <table border="1" width="300">
+
+        <tr>
+            <th>学生信息</th><td><input type="text" name="name" value="<?php echo $row['name'] ?>"></td>
+        </tr>
+        <tr>
+            <th>学生成绩</th><td><input type="text" name="score" value="<?php echo $row['score'] ?>"></td>
+        </tr>
+        <input type="text" name="id" value="<?php echo $row['id'] ?>" hidden>
+        <tr>
+            <td colspan="2" align="center"><input type="submit" name='submit' value="提交">&nbsp;&nbsp;&nbsp;&nbsp; <input type="reset" value="取消"></td>
+
+        </tr>
+    </table>
+    <a href="index.php">返回</a>
+
+</form>
+</html>
+```
+
+update.php
+
+```php+HTML
+<?php
+/**
+ * Created by PhpStorm.
+ * User: Administrator
+ * Date: 2022/5/25
+ * Time: 11:33
+ */
+include_once('conn.php');
+
+if(!isset($_POST['submit'])){
+    die("非法访问！");
+}
+$id=$_POST['id'];
+$name=$_POST['name'];
+$score=$_POST['score'];
+
+
+// 定义要执行sql语句
+$sql = "update `user` set `name`='$name',`score`=$score where id=$id";
+//echo $sql;
+// 执行sql语句操作
+$conn=mysqli_connect('localhost','root','root','student');
+
+$res = mysqli_query($conn,$sql);
+if($res){
+    echo "修改成功！<a href='./index.php'>返回首页</a>";
+}else{
+    echo "修改失败！";
+}
+```
+
+delete.php
+
+```php+HTML
+<?php
+/**
+ * Created by PhpStorm.
+ * User: Administrator
+ * Date: 2022/5/25
+ * Time: 11:36
+ */
+include_once('conn.php');
+$id=$_GET['id'];
+
+
+// 定义要执行sql语句。
+$sql = "delete from `user` where id=$id";
+//echo $sql;
+// 执行sql语句操作
+$conn=mysqli_connect('localhost','root','root','student');
+$res = mysqli_query($conn,$sql);
+if($res){
+    echo "删除成功！<a href='./index.php'>返回首页</a>";
+}else{
+    echo "删除失败！";
+}
+```
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
-- 
Gitee

