From f9a056b8a137f2aa3b8eaad0b4216b26acf1b12e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=B8=81=E7=B4=AB=E5=A6=8D?= <3053633754@qq.com>
Date: Tue, 24 May 2022 22:58:43 +0800
Subject: [PATCH] test

---
 ...41\347\220\206\347\263\273\347\273\237.md" | 168 ++++++++++++++++++
 1 file changed, 168 insertions(+)
 create mode 100644 "\344\270\201\347\264\253\345\246\215/20220524-\345\255\246\347\224\237\347\256\241\347\220\206\347\263\273\347\273\237.md"
diff --git "a/\344\270\201\347\264\253\345\246\215/20220524-\345\255\246\347\224\237\347\256\241\347\220\206\347\263\273\347\273\237.md" "b/\344\270\201\347\264\253\345\246\215/20220524-\345\255\246\347\224\237\347\256\241\347\220\206\347\263\273\347\273\237.md"
new file mode 100644
index 0000000..3dd13bd
--- /dev/null
+++ "b/\344\270\201\347\264\253\345\246\215/20220524-\345\255\246\347\224\237\347\256\241\347\220\206\347\263\273\347\273\237.md"
@@ -0,0 +1,168 @@
+# 学生管理系统
+
+```sql
+CREATE DATABASE student charset utf8;
+use student;
+create table user(
+id int PRIMARY KEY auto_increment,
+name VARCHAR(20) not null,
+score DECIMAL(8,2) not null
+)
+```
+
+```php
+//连接数据库
+<?php
+error_reporting(E_ALL^E_WARNING);
+$conn=mysqli_connect("localhost","root","root","student") or die("连接失败");
+mysqli_query($conn,'set names utf8');
+
+```
+
+```php+HTML
+//首页
+<?php
+include_once('connect.php');
+$sql = "select * from `user` order by id";
+$result = mysqli_query($conn,$sql);
+?>
+<html>
+<head><meta charset="utf8">
+    <title>学生管理系统</title>
+</head>
+<body>
+<h1>学生管理系统</h1>
+<table border="1" width="500">
+    <tr>
+        <th>学号</th>
+        <th>姓名</th>
+        <th>成绩</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 align="center">
+                <td><?php echo $row['id'] ?></td>
+                <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="delect.php?id=<?php echo $row['id'] ?>" onclick="return del();">删除</a></td>
+            </tr>
+            <?php
+        }
+    }
+    ?>
+</table>
+<a href="add.php">添加数据</a>
+</body>
+</html>
+
+```
+
+```html
+//添加数据
+<?php
+?>
+<html>
+<head>
+    <title>添加数据</title>
+</head>
+<h1>添加数据</h1>
+<form action="update.php" method="post">
+    <table border="1" width="400">
+        <tr>
+            <th>学号</th><td><input type="text" name="id"></td>
+        </tr>
+        <tr>
+            <th>姓名</th><td><input type="text" name="name"></td>
+        </tr>
+        <tr>
+            <th>成绩</th><td><input type="text" name="score"></td>
+        </tr>
+        <tr>
+            <td colspan="2" align="center"><input type="submit" value="提交">&nbsp;
+                <input type="reset" value="取消"></td>
+        </tr>
+    </table>
+    <a href="index.php">返回首页</a>
+</form>
+</html>
+
+```
+
+```php
+<?php
+include_once('connect.php');
+if (!isset($_POST['submit'])){
+    die("非法访问！！！");
+}
+$id=$_POST['id'];
+$name=$_POST['name'];
+$score=$_POST['score'];
+$sql="update `user` set `id`='$id',`name`='$name',`score`='$score' where id=$id";
+
+$ret= mysqli_query($conn,$sql);
+if ($ret){
+    echo "修改成功 <a href='index.php'>返回首页</a>";
+}else{
+    echo "修改失败";
+}
+
+
+```
+
+```php+HTML
+<?php
+include_once ("./connect.php");
+if(!isset($_GET['id'])){
+    die("非法访问！");
+}
+$id=$_GET['id'];
+$sql = "select * from `user` where `id`=$id";
+$result = mysqli_query($conn,$sql);
+$row = mysqli_fetch_assoc($result);
+?>
+<html>
+<head>
+    <title>修改数据</title>
+</head>
+<h1>修改数据</h1>
+<form action="update.php" method="post">
+    <table border="1" width="400">
+        <tr>
+            <th>学号</th><td><input type="text" name="id" value="<?php echo $row['id'] ?>"></td>
+        </tr>
+        <tr>
+            <th>姓名</th><td><input type="text" name="name" value="<?php echo $row['name'] ?>"></td>
+        </tr>
+        <tr>
+            <th>成绩</th><td><input type="text" name="score" value="<?php echo $row['score'] ?>"></td>
+        </tr>
+        <input type="text" name="id" value="<?php echo $row['id'] ?>" hidden>
+        <tr>
+            <td colspan="2" align="center"><input type="submit" name='submit' value="提交">&nbsp; <input type="reset" value="取消"></td>
+        </tr>
+    </table>
+    <a href="index.php">返回首页</a>
+</form>
+</html>
+
+```
+
+```php
+<?php
+include_once('connect.php');
+$id=$_GET['id'];
+$sql = "delete from `user` where id=$id";
+$ret = mysqli_query($conn,$sql);
+if($ret){
+    echo "删除成功！<a href='./index.php'>返回首页</a>";
+}else{
+    echo "修改失败！";
+}
+```
+
-- 
Gitee

