From ecdfb3786aafbd6f0a178013422fba9105e16fc3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=99=88=E6=80=9D=E7=87=95?= <3295646815@qq.com>
Date: Tue, 24 May 2022 21:45:44 +0800
Subject: [PATCH] h

---
 ...23\347\232\204\350\277\236\346\216\245.md" |  37 ++-
 .../20220524-\344\275\234\344\270\232.md"     | 288 ++++++++++++++++++
 2 files changed, 310 insertions(+), 15 deletions(-)
 create mode 100644 "\351\231\210\346\200\235\347\207\225/20220524-\344\275\234\344\270\232.md"
diff --git "a/\351\231\210\346\200\235\347\207\225/20220523-php\346\225\260\346\215\256\345\272\223\347\232\204\350\277\236\346\216\245.md" "b/\351\231\210\346\200\235\347\207\225/20220523-php\346\225\260\346\215\256\345\272\223\347\232\204\350\277\236\346\216\245.md"
index e56fd3e..83e19ab 100644
--- "a/\351\231\210\346\200\235\347\207\225/20220523-php\346\225\260\346\215\256\345\272\223\347\232\204\350\277\236\346\216\245.md"
+++ "b/\351\231\210\346\200\235\347\207\225/20220523-php\346\225\260\346\215\256\345\272\223\347\232\204\350\277\236\346\216\245.md"
@@ -20,13 +20,19 @@ insert into user(id,name,score) values
 
 ```php
 <?php
-error_reporting(E_ALL^E_WARNING);// 错误报错级别
-$a = mysqli_connect('localhost','root','root','student');
-if (!$a){
-    echo "连接失败，".mysqli_connect_error();
-    die();
-}
-mysqli_query($a,"set names utf8");
+/**
+
+ * Created by PhpStorm.
+ * User: Administrator
+ * Date: 2022/5/24
+ * Time: 13:57
+   */
+   error_reporting(E_ALL^E_WARNING);// 错误报错级别
+   $a = mysqli_connect('127.0.0.1','root','123456','student') ;
+   if (!$a){
+   die("连接失败，".mysqli_connect_error());
+   }
+   mysqli_query($a,"set names utf8");
 
 // 选择数据库
 $b=mysqli_select_db($a,'student');
@@ -34,10 +40,10 @@ if (!$b){
     die("数据库选择失败：".mysqli_error($a));
 }
 
-// 添加数据
-$sql="insert into 'user'('id','name','score') values ('4','小明','88')";
+ //添加数据
+$sql="insert into user(name,score) values ('小明',88)";
 
-// 执行操作
+ //执行操作
 
 $result=mysqli_query($a,$sql);
 if ($result){
@@ -47,19 +53,20 @@ if ($result){
 }
 
 // 删除数据
-$sql2="delete from 'user' where id='4'";
+$sql2="delete from user where id=10";
 $result=mysqli_query($a,$sql2);
 $sum=mysqli_affected_rows($a);
 if ($sum==0){
     echo "没有匹配的数据，删除失败！";
 }else if ($sum<0){
+    echo mysqli_errno($a);
     die("程序失败");
 }else{
     echo "删除成功！";
 }
 
 // 修改数据
-$sql3="update user set name='张三' where id=3 ";
+$sql3="update 'user' set name='张三' where id=3 ";
 $result=mysqli_query($a,$sql3);
 if ($result==0){
     echo "修改成功";
@@ -68,13 +75,13 @@ if ($result==0){
 }
 
 // 查询数据
-$sql4="select * from 'user'";
+$sql4="select * from user";
 $result=mysqli_query($a,$sql4) or die("发生错误".mysqli_error($a));
 
 while ($r=mysqli_fetch_array($result)){
-    echo $r['id']."=".$r['name']."=".$r['score'];
-}
+    echo $r['id']." ".$r['name']." ".$r['score']."<br>";
 
+}
 ```
 
 
diff --git "a/\351\231\210\346\200\235\347\207\225/20220524-\344\275\234\344\270\232.md" "b/\351\231\210\346\200\235\347\207\225/20220524-\344\275\234\344\270\232.md"
new file mode 100644
index 0000000..c6a80b3
--- /dev/null
+++ "b/\351\231\210\346\200\235\347\207\225/20220524-\344\275\234\344\270\232.md"
@@ -0,0 +1,288 @@
+#                     作业
+
+
+
+```php
+文件名conn.php
+
+
+<?php
+/**
+
+ * 建立一个专门用来连接服务器和数据库的文件
+   */
+   error_reporting(E_ALL ^ E_WARNING);
+   // 连服务器
+   $conn =mysqli_connect('localhost','root','root','student') or die("服务器连接失败！");
+   // 设置字符utf8
+   mysqli_query($conn,'set names utf8');
+
+
+```
+
+
+
+```php
+文件名index
+
+<?php
+
+//error_reporting(E_ALL^E_WARNING);// 错误报错级别
+//$conn=mysqli_connect('127.0.0.1','root','123456','student');
+//if (!$conn){
+//    die("连接失败，".mysqli_connect_error());
+//}
+//mysqli_query($conn,'set names utf8');
+
+include_once('conn.php');// 包含数据库文件
+$sql = "select * from `student` order by id";// 把student表里的所有数据查询出来的语句
+$result = mysqli_query($conn,$sql);//执行上面的语句,返回一个结果集
+
+
+?>
+
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>学生信息表</title>
+    <script>
+        function del(){
+            if (!window.confirm("确定删除？")){
+                return false;
+            }
+        }
+    </script>
+</head>
+<body>
+<h1>学生信息表-首页</h1>
+<table border="1"  width="600">
+    <tr align="center">
+        <th>学生学号</th>
+        <th>学生姓名</th>
+        <th>学生成绩</th>
+        <th>操作</th>
+
+
+
+    </tr>
+    <?php
+    if (!mysqli_num_rows($result)){
+        echo "<tr align='center'><td colspan='4'> 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>
+                <td><a href="edit.php?id=<?php echo $row['id'] ?>">修改</a>|
+                    <a href="delete.php?id=<?php echo $row['id'] ?>" onclick="return del();">删除</a></td>
+            </tr>
+            <?php
+        }
+    }
+    ?>
+
+
+</table>
+<a href="add.php">添加学生信息</a>
+</body>
+</html>
+
+
+```
+
+
+
+```php
+文件名 add.php
+
+
+
+
+<?php
+
+   ?>
+
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>添加数据</title>
+</head>
+<body>
+<h1>添加学生信息</h1>
+<form action="save.php " method="post">
+    <table border="1" width="300">
+
+        <tr>
+            <th>学生姓名</th><td><input type="text" name="name"></td>
+        </tr>
+        <tr>
+            <th>学生成绩</th><td><input type="text" name="score"></td>
+        </tr>
+        <tr>
+            <td  colspan="2" align="center"><input type="submit" name="submit" value="提交">&nbsp;&nbsp;&nbsp;&nbsp; <input type="reset" value="取消"></td>
+        </tr>
+
+
+    </table>
+    <a href="index.php">返回</a>
+
+</form>
+</body>
+</html>
+```
+
+
+
+```php
+文件名save.php
+
+
+
+<?php
+
+   // 包含数据库连接文件
+   include_once('conn.php');
+   if (!isset($_POST['submit'])){
+   die("非法访问");
+   }
+
+$name=$_POST['name'];// 姓名
+$score=$_POST['score'];// 成绩
+// 定义要执行sql语句。
+$sql="insert into 'user'(name,score) values ('$name',$score)";
+// 执行sql语句操作
+$ret=mysqli_query($conn,$sql);
+if ($ret){
+    echo "添加成功！<a href='./index.php'>返回首页</a>" ;
+}else{
+    echo "添加失败！";
+}
+```
+
+
+
+
+
+```php
+文件名edit.php
+
+
+
+<?php
+/**
+
+ * Created by PhpStorm.
+ * User: Administrator
+ * Date: 2022/5/24
+ * Time: 19:51
+   */
+   // 包含数据库连接文件
+   include_once('./conn.php');
+   if (!isset($_GET['id'])){
+   die("非法访问");
+   }
+
+$id=$_POST['id'];// 学号
+// 定义要执行sql语句。
+$sql="select * from user where id=$id";
+$result=mysqli_query($conn,$sql);
+$row=mysqli_fetch_assoc($result);
+?>
+
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>修改学生信息</title>
+</head>
+<body>
+<h1>修改信息</h1>
+<form action="update.php" method="post">
+    <table border="1" width="300">
+        
+        <tr>
+            <th>学生姓名</th><td><input type="text" name="name" value="<?php echo $row['name'] ?>"></td>
+        </tr>
+        <tr>
+            <th>学生成绩</th><td><input type="text" name="score" value="<?php echo $row['score'] ?>"></td>
+        </tr>
+        <input type="text" name="id" value="<?php echo $row['id'] ?>" hidden>
+        <tr>
+            <td colspan="2" align="center"><input type="submit" name='submit' value="提交">&nbsp;&nbsp;&nbsp;&nbsp; <input type="reset" value="取消"></td>
+
+
+        </tr>
+    </table>
+    <a href="index.php">返回</a>
+
+</body>
+</html>
+```
+
+
+
+```php
+文件名update.php
+
+
+<?php
+/**
+
+ * Created by PhpStorm.
+ * User: Administrator
+ * Date: 2022/5/24
+ * Time: 20:41
+   */
+   // 包含数据库连接文件
+   include_once('conn.php');
+   if (!isset($_POST['submit'])){
+   die("非法访问");
+   }
+   $id=$_POST['id'];// 学号
+   $name=$_POST['name'];// 姓名
+   $score=$_POST['score'];// 成绩
+   // 定义要执行sql语句。
+   $sql="update user set name='$name',score=$score  where id=$id";
+   // 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！";
+   }
+
+
+```
+
+
+
+
+
+```php
+文件名delete.php
+
+
+<?php
+/**
+
+ * 接收表单数据。并提交到数据库
+   */
+   // 包含数据库连接文件
+
+include_once('conn.php');
+$id=$_GET['id'];
+// 定义要执行sql语句。
+$sql = "delete from user where id=$id";
+// 执行sql语句操作
+$ret = mysqli_query($conn,$sql);
+if($ret){
+    echo "删除成功！<a href='./index.php'>返回首页</a>";
+}else{
+    echo "删除失败！";
+}
+```
+
-- 
Gitee

