如何删除包含多个帖子的页面中的帖子？ [MySql]

Question

我想进行一个查询，从页面中删除帖子（线程），但在该页面中我有多个帖子，我的数据库中有一个名为 id_thread 的字段是每个帖子的唯一 ID，但我列出了多个页面中同一用户的帖子，这是列出帖子的页面的代码：

<?
session_start();

  if(isset($_SESSION['id']))
  {
    $servername = "(...)";
    $username = "(...)";
    $password = "(...)";
    $dbname = "(...)";

    $connect  = mysqli_connect($servername, $username, $password, $dbname);

    if (!$connect) {
        die("Connection failed: " . mysqli_connect_error());
    }

}
else
{
  header(" url=index.php");
}

?>


(... hidded non relative html code ....)


<?
      $id = (isset($_GET['id'])) ? $_GET['id'] : $_SESSION['id'];

        $query = mysqli_query($connect,"SELECT * FROM thread inner join category on thread.id_type=category.id_type WHERE username = '".$id."'");

      echo '<div class="container marg-t-100">'."All posts from User: ".$id.'</div>';
      echo '<div class="container-fluid marg-t-25">';
      while($row = mysqli_fetch_array($query))
      {
      echo '<div class="col-md-1"></div>';
      echo '<div class="col-md-11">';
      echo '<form role="form" action="delete.php" method="post"><a type="submit" class="btn btn-danger marg-t-10 pull-right">Delete Thread</a></form>';
      echo  $row['title'] ."<br><br>".$row['content']."<br><br>".'<div class="pull-right">'. "date: ".$row['data']."<br>"."author: ".$row['username']."<br>".$row['name'].'</div>' ."<br><br><br><hr><br>";
      echo '</div>';
      }
      echo '</div>';
      mysqli_close($connect);
?>
  (...)

这是我正在谈论的页面的图像：

我希望当我单击“删除线程”时，相应的帖子（线程）会从数据库中删除。

如果您在上面的页面代码中看到，您可以看到删除按钮在 delete.php 处起作用，这是我在该文件上的代码：

<?php
session_start();

  if(isset($_SESSION['id']))
  {
    $servername = "(...)";
    $username = "(...)";
    $password = "(...)";
    $dbname = "(...)";

    $connect  = mysqli_connect($servername, $username, $password, $dbname);

    $id = (isset($_GET['id'])) ? $_GET['id'] : $_SESSION['id'];

      $query = mysqli_query($connect,"Delete FROM thread WHERE username = '".$id."' and id_thread ='".(I WANT THE RELATIVE ID HERE)."'");


    if (!$connect) {
        die("Connection failed: " . mysqli_connect_error());
    }

}
else
{
  header(" url=index.php");
}


 ?>

Answer 1

在列出用户帖子的页面中，在表单内添加一个隐藏字段，其值为帖子 ID 和 name 属性，稍后您将在 POST 中使用该属性strong> 变量。

echo '<form role="form" action="delete.php" method="post"><button type="submit" class="btn btn-danger marg-t-10 pull-right" value="Delete Thread"><input type="hidden" name="thread_id" value="'.$row['id'].'"></form>';

而在delete.php查询部分：

$query = mysqli_query($connect,"Delete FROM thread WHERE username = '".$id."' and id_thread ='.$_POST['thread_id']);

Answer 2

<?
  echo '<form role="form" action="delete.php?id='.$row['thread_id'].'" method="post"><input type="submit" class="btn btn-danger marg-t-10 pull-right" value="Delete Thread"></form>';

删除.php

<?php
session_start();

if(isset($_SESSION['id']))
{
$servername = "(...)";
$username = "(...)";
$password = "(...)";
$dbname = "(...)";

$connect  = mysqli_connect($servername, $username, $password, $dbname);
$id=$_SESSION['id'];
$thread_id = $_GET['title'];

  $query = mysqli_query($connect,"Delete FROM thread WHERE username = '".$id."' and thread_id ='".$thread_id."'");


if (!$connect) {
    die("Connection failed: " . mysqli_connect_error());
}

}
else
{
header(" url=index.php");
}


?>

我希望这是你所要求的。