PHP开发 学生管理教程之数据库操作

创建action.php 文件

本文件使用了switch，case语句，将删除，修改，添加等对数据的处理放在同一个页面，减少了代码的重复性

代码如下

<?php
header("content-type:text/html;charset=utf8");
$conn=mysqli_connect("localhost","root","root","study");
mysqli_set_charset($conn,"utf8");
if($conn){
    switch ($_GET['action']){
        case 'add'://add
            $name = $_POST['name'];
            $sex = $_POST['sex'];
            $age = $_POST['age'];
            $class = $_POST['class'];
            $sql = "insert into stu (`name`, sex, age, class) values ('$name', '$sex','$age','$class')";
            $rw = mysqli_query($conn,$sql);
            if ($rw > 0){
                echo "<script>alert('添加成功');</script>";
            }else{
                echo "<script>alert('添加失败');</script>";
            }
            header('Location: index.php');
            break;
        case 'del'://get
            $id = $_GET['id'];
            $sql = "delete from stu where id='$id'";
            $rw = mysqli_query($conn,$sql);
            if ($rw > 0){
                echo "<script>alert('删除成功');</script>";
            }else{
                echo "<script>alert('删除失败');</script>";
            }
            header('Location: index.php');
            break;
        case 'edit'://post
            $id = $_POST['id'];
            $name = $_POST['name'];
            $age = $_POST['age'];
            $class = $_POST['class'];
            $sex = $_POST['sex'];
//    echo $id, $age, $age, $name;
            $sql = "update stu set name='$name', age='$age',sex='$sex',class='$class' where id='$id';";
//    $sql = "update myapp.stu set name='jike',sex='女', age=24,classid=44 where id=17";
//            print $sql;
            $rw = mysqli_query($conn,$sql);
//            var_dump($rw);
//            die();
            if ($rw > 0){
                echo "<script>alert('更新成功');</script>";
            }else{
                echo "<script>alert('更新失败');</script>";
            }
            header('Location: index.php');
            break;
        default:
            header('Location: index.php');
            break;
    }
}else{
    die('数据库连接失败' .mysqli_connect_error());
}
?>