From 8197857c75bad65eb7e31e4380daccdd4f60864d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=A8=E8=8C=97=E5=8D=9A?= <1072852081@qq.com>
Date: Sun, 29 May 2022 23:56:39 +0800
Subject: [PATCH] 11

---
 ...73\345\275\225\347\263\273\347\273\237.md" | 289 ++++++++++++++++++
 1 file changed, 289 insertions(+)
 create mode 100644 "\346\235\250\350\214\227\345\215\232/20220529-\345\255\246\347\224\237\347\231\273\345\275\225\347\263\273\347\273\237.md"
diff --git "a/\346\235\250\350\214\227\345\215\232/20220529-\345\255\246\347\224\237\347\231\273\345\275\225\347\263\273\347\273\237.md" "b/\346\235\250\350\214\227\345\215\232/20220529-\345\255\246\347\224\237\347\231\273\345\275\225\347\263\273\347\273\237.md"
new file mode 100644
index 0000000..33d86d2
--- /dev/null
+++ "b/\346\235\250\350\214\227\345\215\232/20220529-\345\255\246\347\224\237\347\231\273\345\275\225\347\263\273\347\273\237.md"
@@ -0,0 +1,289 @@
+```php
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>学生界面登入</title>
+</head>
+<body>
+<form action="yanzhen.php" method="post">
+    <h1>学生系统登入界面</h1>
+    <table>
+        <tr>
+            <td>请输入你的账号 <input type="text" name="user"></td>
+        </tr>
+        <tr>
+            <td>请输入你的密码 <input type="password" name="password"></td>
+        </tr>
+        <tr>
+            <td><input type="submit" value="提交" name="submit"></td>
+        </tr>
+    </table>
+</form>
+</body>
+</html>
+```
+
+yanzhen // 验证登入密码是否正确
+
+```php
+<?php
+
+session_start();
+$zh = 'uu';
+$mm = '11';
+
+if ($_POST['user'] == $zh && $_POST['password'] == $mm){
+//    echo "登入成功";
+    $_SESSION['user']=$zh;
+    header('location:chenggong.php');
+}else{
+    echo "登入失败 <a href='xuesheng.html'>返回首页</a>";
+}
+```
+
+chenggong //登入成功后进入的学生信息主页
+
+```php
+<?php
+// 启动
+session_start();
+// 接收用户名
+$user = $_SESSION['user'];
+// 如果用户存在 并且用户名是正确的那么判断成功
+if (isset($user) && $user == 'uu'){
+    echo "学生系统";
+    // 调用连接数据库
+    include_once('lianjie.php');
+    // 查询sql
+    $cx = "select * from `user`";
+    // 执行操作
+    $zx = mysqli_query($lj,$cx);
+    ?>
+       
+    <html lang="en">
+    <head>
+        <meta charset="UTF-8">
+        <title>学生系统界面</title>
+    </head>
+    <body>
+        <h1>学生系统界面操作</h1>
+        <table border="1">
+            <tr>
+                <th>学生编号</th>
+                <th>学生姓名</th>
+                <th>学生成绩</th>
+                <th>操作</th>
+            </tr>
+            <?php
+            // 判断
+            if (!mysqli_num_rows($zx)){
+                echo "<tr align='center'><td colspan='5'>暂无学生数据</td></tr>";
+            }else {
+                // 输出一行数据
+                while ($a = mysqli_fetch_assoc($zx)) {
+                    ?>
+                    <tr>
+                        <td><?php echo $a['id'] ?></td>
+                        <td><?php echo $a['name'] ?></td>
+                        <td><?php echo $a['score'] ?></td>
+                        <td>
+                            <a href="edit.php?id=<?php echo $a['id']?>">修改</a>
+                            <a href="delete.php?id=<?php echo $a['id'] ?>">删除</a>
+                        </td>
+                    </tr>
+                    <?php
+                }
+            }
+                    ?>
+            <tr>
+                <td align="center" colspan="5"><a href="add.php">添加学生</a></td>
+            </tr>
+                    </table>
+                    </body>
+                    </html>
+                    <?php
+
+    echo "<br>";
+    echo "<a href='zhuxiao.php'>注销用户</a>";
+}else{
+    echo "进入失败";
+}
+```
+
+zhuxiao // 注销该用户
+
+```php
+<?php
+session_start();
+// 删除用户
+unset($_SESSION['user']);
+echo "删除成功";
+header('location:xuesheng.html');
+```
+
+lianjie // 连接数据库
+
+```php
+<?php
+error_reporting(E_ALL^E_WARNING);
+// 连接数据库
+$lj = mysqli_connect('127.0.0.1','root','root','student') or die("连接失败");
+// 设置字符集
+mysqli_query($lj,'set names utf8');
+```
+
+add // 添加学生信息html界面
+
+```php
+<?php
+?>
+<html lang="en">
+<head>
+<!--    <meta charset="UTF-8">-->
+    <title>添加学生</title>
+</head>
+
+<h1 align="center">添加学生</h1>
+<form action="save.php" method="post">
+    <table align="center" width="260" border="1">
+        <tr>
+            <td>学生名字</td>
+            <td><input type="text" name="name"></td>
+        </tr>
+        <tr>
+            <td>学生成绩</td>
+            <td><input type="text" name="score"></td>
+        </tr>
+        <tr>
+            <td><input type="submit" value="提交" name="submit"></td>
+            <td><input type="reset" value="取消"></td>
+        </tr>
+        <tr>
+            <td><a href="zhuye.php">返回主页</a></td>
+        </tr>
+    </table>
+</form>
+</html>
+```
+
+save // 连接数据库执行添加sql
+
+```php
+<?php
+// 接收表单数据 并提交到数据库
+// 连接数据库
+include_once ('lianjie.php');
+
+if (!isset($_POST['submit'])){
+    die("不可访问");
+}
+
+$name = $_POST['name']; // 学生的名字
+$score =$_POST['score']; // 学生的成绩
+
+// 执行添加语句
+$tj = "insert into `user` (id,name,score) values (null,'$name','$score')";
+// 执行操作
+$zx = mysqli_query($lj,$tj);
+if ($zx){
+    echo "添加成功 <a href='chenggong.php'>返回主页</a>";
+}else{
+    echo "添加失败";
+}
+```
+
+edit // 修改学生html的界面
+
+```php
+<?php
+
+include_once ('lianjie.php');
+if (!isset($_GET['id'])){
+    die("非法访问");
+}
+$id = $_GET['id'];
+
+// 查询id
+$cx = "select * from `user` where `id` = $id";
+// 执行
+$zx = mysqli_query($lj,$cx);
+$sc = mysqli_fetch_assoc($zx);
+?>
+<html>
+<head>
+<!--    <meta charset="UTF-8">-->
+    <title>修改学生</title>
+
+    <h1>修改学生</h1>
+    <form action="update.php" method="post">
+        <table border="1" width="300">
+            <tr>
+                <th>学生名字</th>
+                <td><input type="text" name="name" value="<?php echo $sc['name'] ?>"></td>
+            </tr>
+
+            <tr>
+                <th>学生成绩</th>
+                <td><input type="text" name="score" value="<?php echo $sc['score'] ?>"></td>
+            </tr>
+
+            <input type="text" name="id" value="<?php echo $sc['id'] ?>" hidden>
+
+            <tr>
+                <td colspan="2" align="center"><input type="submit" value="提交" name="submit">
+                    <input type="reset" value="取消" >
+                </td>
+            </tr>
+
+        </table>
+        <a href="zhuye.php">返回主页</a>
+    </form>
+</head>
+</html>
+```
+
+update // 连接数据课进行修改sql
+
+```
+<?php
+// 接收数据提交数据库
+include_once('lianjie.php');
+
+if (!isset($_POST['submit'])){
+    die("非法访问");
+}
+
+$id = $_POST['id']; // 学号
+$name = $_POST['name']; // 学生的名字
+$score =$_POST['score']; // 学生的成绩
+
+// 执行添加语句
+$tj = "update `user` set `name` = '$name',`score` = '$score'";
+// 执行操作
+$zx = mysqli_query($lj,$tj);
+if ($zx){
+    echo "修改成功 <a href='chenggong.php'>返回主页</a>";
+}else{
+    echo "修改失败";
+}
+```
+
+delete // 删除学生的信息
+
+```php
+<?php
+include_once('lianjie.php');
+$id = $_GET['id']; // 得到要删除的学生id
+
+// 执行删除
+$sc = "delete from `user` where id = $id";
+//
+$zx = mysqli_query($lj,$sc);
+
+if ($zx){
+    echo "删除成功 <a href='chenggong.php'>返回主页</a>";
+}else{
+    echo "修改失败";
+}
+```
\ No newline at end of file
-- 
Gitee

