From 9d53beb090478d17ff2c00a81e3af497d9168e95 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=99=88=E6=A2=81=E6=9D=B0?= <2335099731@qq.com>
Date: Sun, 29 May 2022 22:27:37 +0800
Subject: [PATCH] 20220525

---
 .../20220525-\344\274\232\350\257\235.md"     | 327 ++++++++++++++++++
 1 file changed, 327 insertions(+)
 create mode 100644 "\351\231\210\346\242\201\346\235\260/20220525-\344\274\232\350\257\235.md"
diff --git "a/\351\231\210\346\242\201\346\235\260/20220525-\344\274\232\350\257\235.md" "b/\351\231\210\346\242\201\346\235\260/20220525-\344\274\232\350\257\235.md"
new file mode 100644
index 0000000..e46acd9
--- /dev/null
+++ "b/\351\231\210\346\242\201\346\235\260/20220525-\344\274\232\350\257\235.md"
@@ -0,0 +1,327 @@
+创建数据库：
+
+```mysql
+CREATE DATABASE book charset utf8;
+use book;
+
+CREATE TABLE bookif(
+book_id int PRIMARY KEY auto_increment,
+book_name VARCHAR(20) not null,
+book_price DECIMAL not null,
+book_author VARCHAR(20) 
+
+
+);
+```
+
+连接数据库：
+
+```php+HTML
+//conn.php
+<?php
+
+error_reporting(E_ALL^E_WARNING);
+$conn=mysqli_connect("127.0.0.1","root","root","book") or die("连接失败".mysqli_connect_error());
+
+
+```
+
+登录页面：
+
+```php+HTML
+//login.html
+
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>图书管理登录</title>
+</head>
+<body>
+
+<form action="login.php" method="post">
+    用户名:<input type="text" name="username"><br>
+    密  码:<input type="password" name="password"><br>
+    <input type="checkbox" name="auto" value="yes">记住我<br>
+    <input type="submit" name="submit" value="登录">
+</form>
+
+
+
+</body>
+</html>
+```
+
+登录判断:
+
+```php+HTML
+<?php
+session_start();
+$username="admin";
+$password="123456";
+if (!isset($_POST['submit'])){
+  die("非法访问");
+}
+
+
+
+if ($_POST['username']==$username && $_POST['password']==$password){
+    echo "登录成功"."<form action='dome.php' method='post'><input type='submit' name='login' value='去首页'></form>";
+    $_SESSION['username']=$_POST['username'];
+   error_reporting(E_ALL^E_NOTICE);
+    if ($_POST['auto']=='yes'){
+        setcookie("username","$username",time()+60*60*24*7);
+    }
+
+}else{
+    echo "用户名或密码错误"."<a href='login.html'>重试</a>";
+}
+```
+
+注销登录：
+
+```php
+//logout.php
+
+<?php
+
+
+
+unset($_SESSION['username']);
+setcookie("username","",-1);
+header('location:login.html');
+echo "注销成功";
+
+
+
+```
+
+首页：
+
+```php+HTML
+//dome.php
+<?php
+session_start();
+include_once ('conn.php');
+error_reporting(E_ALL^E_NOTICE);
+$sql = "select * from `bookif` order by `book_id`";
+ $select = mysqli_query($conn, $sql);
+$user=$_SESSION['username']?:$_COOKIE['username'];
+
+if (isset($user)){
+
+     echo "欢迎您".$user."  "."<a href='logout.php'>注销</a>";
+
+ }else{
+ die("您还未登录"."<a href='login.html'>去登录</a>");
+ }
+
+?>
+
+
+
+<html>
+    <hand>
+        <meta charset="UTF-8">
+        <title>图书管理系统</title>
+    </hand>
+<body>
+<h1>图书管理系统</h1>
+<table border="1">
+    <tr align="center">
+        <th>图书编号</th>
+        <th>图书名字</th>
+        <th>图书价格</th>
+        <th>图书作者</th>
+        <th>功能</th>
+    </tr>
+
+
+    <?php
+    if (!mysqli_num_rows($select)){
+       echo "<tr align='center' ><td colspan='4'>暂无数据！</td></tr>";
+    }else {
+        while ($row = mysqli_fetch_assoc($select)) {
+
+            ?>
+            <tr>
+                <td><?php echo $row['book_id'] ?></td>
+                <td><?php echo $row['book_name'] ?></td>
+                <td><?php echo $row['book_price'] ?></td>
+                <td><?php echo $row['book_author'] ?></td>
+                <td><a href="add.php?book_id=<?php echo $row['book_id'] ?>">修改</a>|
+                    <a href="del.php?book_id=<?php echo $row['book_id']?>">删除</a></td>
+            </tr>
+
+
+            <?php
+        }
+    }
+?>
+
+
+
+
+</table>
+<a href="amend.php">添加书籍</a>
+
+</body>
+</html>
+
+```
+
+添加书籍：
+
+```php+HTML
+//amend.php
+<?php
+include_once ('conn.php');
+?>
+
+<html>
+<head>
+    <meta charset="UTF-8">
+    <title>添加书籍</title>
+</head>
+<body>
+<h1>添加书籍</h1>
+<form action="save.php" method="post">
+
+     图书名字：<input type="text" name="book_name"><br>
+     图书价格：<input type="text" name="book_price"><br>
+     图书作者：<input type="text" name="book_author"><br>
+     <input type="submit" name="submit" value="提交">
+
+
+
+</form>
+
+
+
+</body>
+</html>
+
+
+
+
+```
+
+添加书籍处理：
+
+```php+HTML
+//save.php
+<?php
+include_once ('conn.php');
+
+if(!isset($_POST['submit'])){
+    die("非法访问");
+}
+
+
+$book_name=$_POST['book_name'];
+$book_price=$_POST['book_price'];
+$book_author=$_POST['book_author'];
+
+$sql="insert into `bookif` (`book_name`,`book_price`,`book_author`) values ('$book_name',$book_price,'$book_author')";
+$re = mysqli_query($conn,$sql);
+
+if (re){
+    echo "添加成功"."<a href='dome.php'>返回</a>";
+}else{
+    echo "添加失败";
+}
+
+
+?>
+```
+
+修改书籍：
+
+```php+HTML
+//add.php
+
+<?php
+include_once ('conn.php');
+$book_id=$_GET['book_id'];
+$sql="select * from `bookif` where `book_id`=$book_id";
+$re=mysqli_query($conn,$sql);
+$row=mysqli_fetch_assoc($re);
+if(!isset($_GET['book_id'])){
+    die("非法访问");
+}
+?>
+
+
+<html>
+<head>
+    <meta charset="UTF-8">
+    <title>修改书籍</title>
+</head>
+<body>
+<h1>修改书籍</h1>
+<form action="update.php" method="post">
+
+    图书名字：<input type="text" name="book_name" value="<?php echo $row['book_name']?>"><br>
+    图书价格：<input type="text" name="book_price" value="<?php echo $row['book_price']?>"><br>
+    图书作者：<input type="text" name="book_author" value="<?php echo $row['book_author']?>"><br>
+    <input type="submit" name="submit" value="提交">
+
+
+
+</form>
+
+
+
+</body>
+</html>
+
+```
+
+修改书籍处理：
+
+```php+HTML
+//update.php
+<?php
+
+include_once ('conn.php');
+if(!isset($_POST['submit'])){
+    die("非法访问");
+}
+$book_name=$_POST['book_name'];
+$book_price=$_POST['book_price'];
+$book_author=$_POST['book_author'];
+
+$sql="update `bookif` set `book_name`='$book_name',`book_price`='$book_price',`book_author`='$book_author'";
+$re=mysqli_query($conn,$sql);
+$up=mysqli_fetch_assoc($re);
+
+
+if($re){
+    echo "更新成功"."<a href='dome.php'>返回</a>";
+}else{
+    echo "更新失败";
+}
+```
+
+删除书籍：
+
+```php+HTML
+//die.php
+<?php
+
+
+
+include_once ('conn.php');
+$book_id=$_GET['book_id'];
+if(!isset($_GET['book_id'])){
+    die("非法访问");
+}
+$sql = "delete from `bookif` where `book_id`=$book_id";
+$re = mysqli_query($conn,$sql);
+if ($re){
+    echo "删除成功"."<a href='dome.php'>返回</a>";
+}else{
+    echo "删除失败";
+}
+```
+
-- 
Gitee

