diff --git "a/\345\220\264\346\265\267\346\266\214/20220525\345\255\246\347\224\237\347\263\273\347\273\237.md" "b/\345\220\264\346\265\267\346\266\214/20220525\345\255\246\347\224\237\347\263\273\347\273\237.md"
new file mode 100644
index 0000000000000000000000000000000000000000..ff718595ef253c8b3e8b6246eb8afa04854bf46c
--- /dev/null
+++ "b/\345\220\264\346\265\267\346\266\214/20220525\345\255\246\347\224\237\347\263\273\347\273\237.md"
@@ -0,0 +1,226 @@
+```html
+<?php
+?>
+<html>
+<head>
+    <title>学生信息</title>
+
+</head>
+<h1>学生信息</h1>
+<form action="save.php" method="post">
+    <table border="1" width="300">
+<!--        <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" 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>
+
+```
+
+```php
+
+<?php
+
+error_reporting(E_ALL ^ E_WARNING);
+
+$conn =mysqli_connect('localhost','root','root','book') or die("服务器连接失败！");
+
+mysqli_query($conn,'set names utf8');
+
+```
+
+```php
+<?php
+
+include_once('conn.php');
+$id=$_GET['id'];
+
+
+
+$sql = "delete from `info` where _id=$_id";
+//echo $sql;
+
+$ret = mysqli_query($conn,$sql);
+if($ret){
+    echo "删除成功！<a href='./index.php'>返回首页</a>";
+}else{
+    echo "修改失败！";
+}
+```
+
+```php
+<?php
+include_once ("./conn.php");
+if(!isset($GET['id'])){
+    die("非法访问！");
+}
+$id=$GET['id'];
+
+$sql = "select * from `info` where `id`=$id";
+$result = mysqli_query($conn,$sql);
+$row = mysqli_fetchassoc($result);
+?>
+<html>
+<head>
+    <title>修改学生信息</title>
+
+</head>
+<h1>修改</h1>
+<form action="update.php" method="post">
+    <table border="1" width="300">
+        <!--        <tr>-->
+        <!--            <th>学号</th><td><input type="text" name="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="price" value="<?php echo $row['price'] ?>"></td>
+        </tr>
+              
+        <input type="text" name="id" value="<?php echo $row['id'] ?>" hidden>
+        <tr>
+            <td colspan="2" align="center"><input type="submit" name='submit' value="提交">&nbsp;&nbsp;&nbsp;&nbsp; <input type="reset" value="取消"></td>
+
+        </tr>
+    </table>
+    <a href="index.php">返回</a>
+
+</form>
+</html>
+
+```
+
+```php
+<?php
+include_once('conn.php');
+$sql = "select * from `info` order by id";
+$result = mysqli_query($conn,$sql);
+?>
+<html>
+<head>
+    <meta charset="utf-8">
+    <title>学生信息系统</title>
+    <script>
+        function del(){
+            if(!window.confirm("确定要删除吗？")){
+                return false;
+            }
+        }
+    </script>
+</head>
+<body>
+<h1>学生信息系统-首页</h1>
+<table border="1" width="600">
+    <tr>
+        <th>学号</th>
+        <th>姓名</th>
+        <th>成绩</th>
+       
+    </tr>
+<?php
+
+if(!mysqli_num_rows($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 $row['score'] ?></td>
+            
+        </tr>
+        <?php
+    }
+}
+?>
+</table>
+<a href="add.php">添加学生信息</a>
+</body>
+</html>
+
+```
+
+```php
+<?php
+
+include_once('conn.php');
+
+if(!isset($_POST['submit'])){
+    die("非法访问！");
+}
+
+$name=$_POST['name'];// 书名
+$score=$_POST['score'];// 价格
+
+
+
+$sql = "insert into `bookinfo` (name,score)
+ values ('$name',$score)";
+//echo $sql;
+
+$ret = mysqli_query($conn,$sql);
+if($ret){
+    echo "添加成功！<a href='./index.php'>返回首页</a>";
+}else{
+    echo "添加失败！";
+}
+```
+
+```php
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Title</title>
+</head>
+<body>
+<form action="" method="get">
+    编号：<input type="text" name="id">
+    <input type="submit" value="提交">
+</form>
+</body>
+</html>
+```
+
+```php
+<?php
+
+include_once('conn.php');
+
+if(!isset($_POST['submit'])){
+    die("非法访问！");
+}
+$id=$_POST['id'];// 书名
+$name=$_POST['name'];// 书名
+$score=$_POST['score'];// 价格
+
+
+
+$sql = "update `info` set `name`='$name',score=$score
+                        where id=$id";
+//echo $sql;
+// 执行sql语句操作
+$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！";
+}
+```
+
