php - 传递数组并从 MySQL 表中删除

Question

我在 mysql 中有一个表，我通过以下代码将其打印在屏幕上:

include ('mysql_con.php');
mysql_select_db("jaz", $con);

$res1 = mysql_query("SELECT * FROM hovno ORDER BY id DESC");

echo "<form action='delete_from_db.php' method='POST'>";
echo "<table border='1'>";
echo "<tr>";
echo "<td colspan='6'>" . "<input type='submit' value='Delete Article'>" . "</td>";
echo "</tr>";
echo "<tr>";
echo "<td>" . "<b>" . "Delete" . "</b>" . "</td>";
echo "<td>" . "<b>" . "ID" . "</b>" . "</td>";
echo "<td>" . "<b>" . "Date" . "</b>" . "</td>";
echo "<td>" . "<b>" . "Title" . "</b>" . "</td>";
echo "<td>" . "<b>" . "Preview" . "</b>" . "</td>";
echo "<td>" . "<b>" . "Author" . "</b>" . "</td>";
echo "</tr>";
while($a=mysql_fetch_array($res1))  {
echo "<tr>";
echo "<td>" . "<input type='checkbox' name='checkbox[]' value='" . $a["id"] . "'>" . "</td>";
echo "<td>" . $a["id"] . "</td>";
echo "<td>" . $a["created"] . "</td>";
echo "<td>" . $a["title"] . "</td>";
echo "<td>" . $a["preview"] . "</td>";
echo "<td>" . $a["author"] . "</td>";
echo "</tr>";
                                }
echo "</table>";
echo "</form>";

所以我将 id 作为复选框值放入数组中。 在另一个 php 文件中，我不想在数组中使用此 id 来删除带有这些 id 的记录。我不知道要使用什么代码来购买我尝试过:

<?php

include ('mysql_con.php');
mysql_select_db("jaz", $con) or die(mysql_error());

        $del[]=$_POST["checkbox"];

        $res1 = mysql_query("SELECT * FROM hovno WHERE id='$del'") or die(mysql_error());

    while($a = mysql_fetch_array($res1)){
            $b = $a["id"];
            mysql_query("DELETE FROM hovno WHERE id ='$b'") or die(mysql_error());
    }

？>

知道如何让它真正发挥作用吗？谢谢

Answer 1

虽然我不确定 PHP，但如果您获得以逗号分隔的 ID 列表，则可以使用 SQL 运算符“in”。像这样的事情:

$res1 = mysql_query("SELECT * FROM hovno WHERE id in (1,2,3)")

关于变量名的评论: A jeSTLi si ty promenne slusne nepojmenujes, tak se v tom uz nikdy nevyznas ;)