From 62fa3dbfb64bb3406c4348d0a7c04b34ce0d2057 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=82=93=E9=98=B3=E5=B5=98?= <1392315196@qq.com>
Date: Sun, 29 May 2022 12:52:56 +0000
Subject: [PATCH] =?UTF-8?q?=E9=82=93=E9=98=B3=E5=B5=98?=
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---
 ...40\346\224\271\350\241\250\345\215\225.md" | 170 ++++++++++++++++++
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 create mode 100644 "\351\202\223\351\230\263\345\265\230/20220526PHP\345\242\236\345\210\240\346\224\271\350\241\250\345\215\225.md"
diff --git "a/\351\202\223\351\230\263\345\265\230/20220526PHP\345\242\236\345\210\240\346\224\271\350\241\250\345\215\225.md" "b/\351\202\223\351\230\263\345\265\230/20220526PHP\345\242\236\345\210\240\346\224\271\350\241\250\345\215\225.md"
new file mode 100644
index 0000000..9cf48f7
--- /dev/null
+++ "b/\351\202\223\351\230\263\345\265\230/20220526PHP\345\242\236\345\210\240\346\224\271\350\241\250\345\215\225.md"
@@ -0,0 +1,170 @@
+#### 作业
+
+```php
+<?php
+//连接数据库
+include_once ('conn.php');
+//查询数据库的sql语句
+$sql="select*from `user`order by id";
+//执行sql语句得到一个结果集
+$result=mysqli_query($conn,$sql);
+?>
+<html>
+<head>
+    <title>学生管理系统-首页</title>
+    <meta charset="utf-8">
+</head>
+<body>
+<h1>学生管理系统-首页</h1>
+<table border="1" cellpadding="0" cellspacing="0" width="600">
+    <tr>
+        <td>学号</td>
+        <td>姓名</td>
+        <td>成绩</td>
+    </tr>
+    <?php
+    if (!mysqli_num_rows($result)){
+        echo "<tr><td colspan='4' align='center'>没有数据</td></tr>";
+    }else{
+        while ($arr=mysqli_fetch_assoc($result)){
+            ?>
+    <tr align="center">
+        <td><?php echo $arr['id']?></td>
+        <td><?php echo $arr['name']?></td>score
+        <td><?php echo $arr['score']?></td>
+        <td><a href="xuigai.php?id=<?php echo $arr['id'] ?>">编辑</a>| <a href="delete.php?id=<?php echo $arr['id'] ?>" onclick="return del()">删除</a></td>
+    </tr>
+    <?php
+        }
+    }
+    ?>
+</table>
+<a href="tianjia.php">添加学生信息</a>
+</body>
+</html>
+
+
+        
+        
+        
+<?php
+//专门连接服务器的一个文件
+$conn=mysqli_connect('127.0.0.1','root','root','student') or die("连接失败");
+//设置字符集为utf8，避免乱码
+mysqli_query($conn,'set names utf8');        
+        
+        
+        
+        
+        
+<?php
+?>
+<html>
+<head>
+    <title>添加学生信息</title>
+</head>
+<body>
+<h1>添加学生信息</h1>
+<form action="save.php" method="post" name="tianjia">
+    <table border="1" width="200">
+        <tr><th>姓名</th><td><input type="text" name="name"></td></tr>
+        <tr><th>成绩</th><td><input type="text" name="score"></td></tr>
+        <tr align="center"><td colspan="2"><input type="submit" value="提交" onclick="return check()"> | <input type="reset" value="重置"></td></tr>
+    </table>
+</form>
+</body>
+</html>
+        
+        
+        
+<?php
+//接收表单的数据
+$name=$_POST['name'];
+$score=$_POST['score'];
+//连接数据库
+include_once ('conn.php');
+//保存数据到sql的语句
+$sql="insert into `user` value(null,'$name','$score')";
+//执行上面的语句
+$result=mysqli_query($conn,$sql);
+if ($result){
+    echo "添加成功<a href='index.php'>返回主页</a>";
+}else{
+    echo "<script>alert('添加失败!');history.go(-1);</script>";
+}
+
+
+
+//删除信息
+<?php
+//用get接受传递的id
+$id=$_GET['id'];
+include_once ('conn.php');
+//删除的语句
+$sql="delete from `user` where id=$id";
+$shan=mysqli_query($conn,$sql);
+if($shan){
+    echo "删除成功<a href='index.php'>返回主页</a>";
+}else{
+    echo "<script>alert('删除失败!');history.go(-1);</script>";
+}
+
+
+
+
+//修改信息
+<?php
+$id=$_GET['id'];
+include_once('conn.php');
+$sql = "select * from `user` where `id`=$id";
+$result = mysqli_query($conn, $sql);
+$arr = mysqli_fetch_assoc($result);// 显示要修改的
+?>
+<html>
+<head>
+    <title>修改信息</title>
+    <meta charset="utf-8">
+</head>
+<body>
+<form action="save update.php" method="post">
+    <table border="1" width="250">
+        <tr>
+            <th>学号</th>
+            <td><?php echo $arr['id'] ?> </td>
+            <input type="text" name="id" value="<?php echo $arr['id'] ?>" hidden>
+        </tr>
+        <tr>
+            <th align="center">姓名</th>
+            <td><input type="text" name="name"  value="<?php echo $arr['name'] ?>"></td>
+        </tr>
+            <th align="center">成绩</th>
+            <td><input type="text" name="score"  value="<?php echo $arr['score'] ?>"></td>
+        </tr>
+        <tr align="center">
+            <td colspan="2"><input type="submit" value="提交"></td>
+        </tr>
+    </table>
+</form>
+</body>
+</html>
+
+
+    
+    
+    
+    
+<?php
+$id=$_POST['id'];
+$name=$_POST['name'];
+$score=$_POST['score'];
+include_once ('conn.php');
+$sql="update `user` set `name`='$name',`score`='$score' where `id`='$id'";
+$result=mysqli_query($conn,$sql);
+if($result){
+    echo "修改成功<a href='index.php'>返回主页</a>";
+}else{
+    echo "<script>alert('修改失败!');history.go(-1);</script>";
+}
+
+```
+
-- 
Gitee

