PHP & MySQL 在同一页面上包含删除按钮

Question

首先感谢您查看我的问题。这是我的第一个 MySql/PHP 项目之一，想知道是否有一种方法可以压缩我创建的这两个页面。

基本上我有一个 MySql 数据库，其中包含一些虚拟填充信息。我创建了一个显示信息的 php 页面:

<?php
// Connect to server and select database.
$link = mysqli_connect("localhost", "root", "password", "testdelete"); //for local machine testing

// Check connection
if($link === false){
    die("ERROR: Could not connect. " . mysqli_connect_error());
}

// select record from mysql 
$sql = "SELECT id, name, lastname, email FROM testdelete.test_mysql";
$result = $link->query($sql);




if ($result->num_rows > 0) {

    include 'table_header.html';
     // output data of each row
     while($row = $result->fetch_assoc()) {

         echo "<tr>";
         echo "<td bgcolor=\"#FFFFFF\">".$row["id"]."</td>";
         echo "<td bgcolor=\"#FFFFFF\">". $row["name"]."</td>";
         echo "<td bgcolor=\"#FFFFFF\">" . $row["lastname"]."</td>";
         echo "<td bgcolor=\"#FFFFFF\">". $row["email"] . "</td>";
         echo "<td bgcolor=\"#FFFFFF\"><a href=\"test_delete_ac.php?id={$row['id']}\">Delete row</a></td>";
         echo "</tr>";

     }

     include 'table_footer.html';
} else {
     echo "0 results";
}



// close connection
mysqli_close($link);


?>

根据代码示例，每行数据都会显示，并且有一列用于删除按钮，因此我可以在需要时删除一行。但是，现在设置的方式是调用二级页面“test_delete_ac.php”，如下所示:

<?php

// Connect to server and select database.
$link = mysqli_connect("localhost", "root", "password", "testdelete"); //for local machine testing

// Check connection
if($link === false){
    die("ERROR: Could not connect. " . mysqli_connect_error());
}

// select record from mysql 
//$sql = "SELECT id, name, lastname, email FROM testdelete.test_mysql";
//$result = $link->query($sql);

// get value of id that sent from address bar 
$id=$_GET['id'];

// Delete data in mysql from row that has this id 
$sql="DELETE FROM testdelete.test_mysql WHERE id='$id'";
$result=$link->query($sql);

// if successfully deleted
if($result){
echo "Deleted Successfully";
echo "<BR>";
echo "<a href='delete.php'>Back to main page</a>";
}

else {
echo "ERROR";
}



// close connection
mysqli_close($link);


?>

一个是为了可用性，我想限制它进入二级页面，并且必须单击“返回”链接。第二，我可以创建一个函数并从链接中调用它来删除行并仍然显示表单吗？比如页面重新加载之类的？

提前感谢你们中的任何人可能提供的任何重定向。

-凯特

Answer 1

是的，只需在您的选择语句上方包含删除逻辑即可。

<?php
// Connect to server and select database.
$link = mysqli_connect("localhost", "root", "password", "testdelete"); //for local machine testing

// Check connection
if ($link === false){
    die("ERROR: Could not connect. " . mysqli_connect_error());
}

// Handle delete
if (isset($_GET['delete_id'])) {
    // get value of id that sent from address bar 
    $delete_id = (int) $_GET['delete_id'];

    // Delete data in mysql from row that has this id 
    $sql="DELETE FROM testdelete.test_mysql WHERE id='$delete_id'";
    $result=$link->query($sql);

    // if successfully deleted
    if ($result){
        echo "Deleted Successfully";
        echo "<BR>";
    } else {
        echo "Delete ERROR";
    }
}

// select record from mysql 
$sql = "SELECT id, name, lastname, email FROM testdelete.test_mysql";
$result = $link->query($sql);

if ($result->num_rows > 0) {
    include 'table_header.html';
    // output data of each row
    while($row = $result->fetch_assoc()) {
        echo "<tr>";
        echo "<td bgcolor=\"#FFFFFF\">".$row["id"]."</td>";
        echo "<td bgcolor=\"#FFFFFF\">". $row["name"]."</td>";
        echo "<td bgcolor=\"#FFFFFF\">" . $row["lastname"]."</td>";
        echo "<td bgcolor=\"#FFFFFF\">". $row["email"] . "</td>";
        echo "<td bgcolor=\"#FFFFFF\"><a href=\"?delete_id={$row['id']}\">Delete row</a></td>";
        echo "</tr>";
     }
     include 'table_footer.html';
} else {
     echo "0 results";
}

// close connection
mysqli_close($link);

?>

不过，请谨慎使用这种方法。由于它只是一个链接，而且如果它是公开的，则机器人可以抓取并删除所有内容。

另外，请注意还有一些其他的变化。我将参数从 id 更改为 delete_id，只是为了避免歧义。我更新了删除链接。我正在检查 $_GET['delete_id'] 在运行删除查询之前是否已设置。而且，我在 $_GET['delete_id'] 上转换 (int) 以确保它实际上是一个整数。