From 4ce94a45df9b8d7e9b8bd75eef459595b721030e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=8E=8B=E6=A1=A5=E5=85=81?= <3029720881@qq.com>
Date: Mon, 30 May 2022 11:17:30 +0800
Subject: [PATCH] a

---
 ...25\345\242\236\345\210\240\346\224\271.md" | 245 ++++++++++++++++++
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 create mode 100644 "\347\216\213\346\243\256\347\232\223/20220530-php\350\241\250\345\215\225\345\242\236\345\210\240\346\224\271.md"
diff --git "a/\347\216\213\346\243\256\347\232\223/20220530-php\350\241\250\345\215\225\345\242\236\345\210\240\346\224\271.md" "b/\347\216\213\346\243\256\347\232\223/20220530-php\350\241\250\345\215\225\345\242\236\345\210\240\346\224\271.md"
new file mode 100644
index 0000000..d9fedbd
--- /dev/null
+++ "b/\347\216\213\346\243\256\347\232\223/20220530-php\350\241\250\345\215\225\345\242\236\345\210\240\346\224\271.md"
@@ -0,0 +1,245 @@
+# php表单增删改
+
+
+
+## 连接数据库
+
+```php
+<?php
+//连接数据库
+//连接服务器，和选择数据库
+header('Content-type:text/html;charset=utf-8');
+$conn =mysqli_connect('localhost','root','wsh020915','bookbook') or die("连接失败");
+//设置字符姐，防止中文乱码
+mysqli_query($conn,'set names utf8');
+```
+
+## 首页的控制
+
+```php
+<?php
+//学生管理系统-首页
+include_once('lianjieshujuku.php');
+//查询数据库的sql语句
+$sql ="select * from `book` order by id";
+$result= mysqli_query($conn,$sql);
+
+?>
+
+<html>
+<head>
+    <title>图书管理系统首页</title>
+    <meta charset="utf-8">
+
+</head>
+
+<body>
+<h1>图书管理系统首页</h1>
+<table border="1" cellpadding="0" cellspacing="0" width="600">
+    <tr>
+        <th>编号</th>
+        <th>书名</th>
+        <th>作者</th>
+        <th>价格</th>
+        <th>库存</th>
+    </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)) { // 从数据里得到一行，以数组的形式返回
+            ?>
+
+            <tr align="center">
+                <td><?php echo $arr['id'] ?></td>
+                <td><?php echo $arr['name'] ?></td>
+                <td><?php echo $arr['zuozhe'] ?></td>
+                <td><?php echo $arr['money'] ?></td>
+                <td><?php echo $arr['kucun'] ?></td>
+                <td><a href="xiugai.php?id=<?php echo $arr['id'];  ?>">编辑</a>||<a href="shanchu.php?id=<?php echo $arr['id']?>"onclick="return del()">删除</a></td>
+            </tr>
+            <?php
+        }
+    };
+    ?>
+</table>
+<a href="tianjia.php">添加图书信息</a>
+</body>
+</html>
+
+
+```
+
+## 添加数据
+
+```php
+<?php
+?>
+<html>
+<head>
+    <title>添加图书信息</title>
+
+</head>
+
+<script>
+    function check(){
+        if(add.name.value=='' || add.zuozhe.value=='' || add.money.value=='' || add.kucun.valuel==''){
+            alert("内容填写不完整！！！");
+            return false;
+        }
+    }
+</script>
+<body>
+<h1>添加图书信息</h1>
+
+<form action="tianjiajieshou.php" method="post" name="add">
+    <table border="1" width="250">
+        <tr><th>书名</th><td><input type="text" name="name" id=""></td></tr>
+        <tr><th>作者</th><td><input type="text" name="zuozhe" id=""></td></tr>
+        <tr><th>价格</th><td><input type="text" name="money" id=""></td></tr>
+        <tr><th>库存</th><td><input type="text" name="kucun" id=""></td></tr>
+        <tr align="center"><td colspan="2"><input type="submit" value="提交" onclick="return check()"> | <input type="reset" value="重置"></td></tr>
+    </table>
+
+
+</form>
+
+
+
+
+</body>
+
+</html>
+
+```
+
+## 添加数据接受
+
+```php
+<?php
+//接受表单数据
+$name = $_POST['name'];
+$zuozhe =$_POST['zuozhe'];
+$money =$_POST['money'];
+$kucun =$_POST['kucun'];
+
+//保存到数据库，先连接到服务器
+include_once ('lianjieshujuku.php');
+
+$sql = "insert into `book` values (null,'$name','$zuozhe',$money,$kucun)";
+
+$result = mysqli_query($conn,$sql);
+
+if($result){
+    echo "添加成功<a href='shouye.php'>返回主页</a>";
+}else{
+    echo "<script>alert('添加失败!');history.go(-1);</script>";
+    echo "1";
+}
+```
+
+## 修改数据
+
+```php
+<?php
+//接受参数
+$id =$_GET['id'];
+
+//引入数据库配置文件
+include_once('lianjieshujuku.php');
+
+//把对应id的数据库信息查询出来，在表单显示
+ $sql ="select * from `book` where `id` =$id";
+ $result = mysqli_query($conn,$sql);//结果集
+ $arr =mysqli_fetch_assoc($result);
+ ?>
+
+<html>
+<head>
+    <title>书籍管理系统</title>
+    <meta charset="utf-8">
+</head>
+<body>
+<h1>书籍管理系统</h1>
+<form action="xiugaijieshou.php" method="post">
+    <table border="1" width="250">
+        <tr>
+            <th>编号</th>
+            <td><?php echo $arr['id'] ?> </td>
+            <input type="text" name="id" value="<?php echo $arr['id'] ?>"hidden >
+        </tr>
+        <tr>
+            <th>书名</th>
+            <td><input type="text" name="name" value="<?php $arr['name'] ?> "></td>
+        </tr>
+
+        <tr>
+            <th>作者</th>
+            <td><input type="text" name="zuozhe" value="<?php $arr['zuozhe'] ?>"></td>
+        </tr>
+        <tr>
+            <th>价格</th>
+            <td><input type="text" name="money" value="<?php $arr['money'] ?>"></td>
+        </tr>
+        <tr>
+            <th>库存</th>
+            <td><input type="text" name="kucun" value="<?php $arr['kucun'] ?>"></td>
+        </tr>
+        <tr align="center">
+            <td colspan="2"><input type="submit" value="提交"></td>
+        </tr>
+    </table>
+</form>
+</body>
+</html>
+
+```
+
+## 修改接受
+
+```php
+<?php
+//保存修改
+//接受表单数据
+$id=$_POST['id'];
+$name=$_POST['name'];
+$zuozhe=$_POST['zuozhe'];
+$money=$_POST['money'];
+$kucun=$_POST['kucun'];
+
+//保存数据到数据库，连接数据库
+include_once('lianjieshujuku.php');
+
+$sql="update `book` set `name`='$name',`zuozhe`='$zuozhe',`money`=$money,`kucun`=$kucun where id=$id";
+
+$result =mysqli_query($conn,$sql);
+
+if ($result){
+    echo "修改成功<a href='shouye.php'>返回主页</a>";
+}else{
+    echo "修改失败";
+}
+```
+
+## 删除
+
+```php
+<?php
+//接受传递的id
+$id =$_GET['id'];
+//因为要删除数据库里的数据，要引入数据库配置文件
+include_once ('lianjieshujuku.php');
+// 写相关的sql语句
+$sql = "delete from `book` where id=$id ";
+
+//执行语句
+$sc=mysqli_query($conn,$sql);
+if ($sc){
+   echo "删除成功 <a href='shouye.php'>返回主页</a>";
+}else{
+    echo "删除失败";
+}
+```
+
-- 
Gitee

