需要简化PDO MySQL循环中的插入

因此，我有这段代码（如下），我想将重复行的堆栈简化为一个简单的循环，给定并输入（比如9）URL和LISTNUM的值。这可能真的很简单，但出于某种原因，我无法让我的大脑绕过它——因为我不知道如何处理其他变量中的变量。。。像$\u POST[$n]

if ($_POST[subby] == "subby" )
{

        try {
        $dbh = new PDO('mysql:host=db2asdfasdf.net;dbname=adsfasdf04', $user, $pass);
          echo "Connected\n";
        } 
        catch (Exception $e) {
          die("Unable to connect: " . $e->getMessage());
        }

        try {  
          $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

          $dbh->beginTransaction();
          $dbh->exec("insert into vim_playlist4 (url, listnum) values ($_POST[video1], 1)");
          $dbh->exec("insert into vim_playlist4 (url, listnum) values ($_POST[video2], 2)");
           $dbh->exec("insert into vim_playlist4 (url, listnum) values ($_POST[video3], 3)");
            $dbh->exec("insert into vim_playlist4 (url, listnum) values ($_POST[video4], 4)");
             $dbh->exec("insert into vim_playlist4 (url, listnum) values ($_POST[video5], 5)");
              $dbh->exec("insert into vim_playlist4 (url, listnum) values ($_POST[video6], 6)");
                      $dbh->exec("insert into vim_playlist4 (url, listnum) values ($_POST[video7], 7)");
                              $dbh->exec("insert into vim_playlist4 (url, listnum) values ($_POST[video8], 8)");
                                      $dbh->exec("insert into vim_playlist4 (url, listnum) values ($_POST[video9], 9)");


          $dbh->commit();

        } 
        catch (Exception $e) {
          $dbh->rollBack();
          echo "Failed: " . $e->getMessage();
        }

}
else 
{}

---

您可以执行如下插入操作：

insert into vim_playlist4 (url, listnum) values 
($_POST[video1], 1), 
($_POST[video2], 2),
($_POST[video3], 3), 
($_POST[video4], 4)

不要忘记在插入数据之前对其进行清理，因为您当前有很多SQL注入易受影响的区域

以下是如何清理数据：

<?php
$dbh->beginTransaction();
$sql = $dbh->prepare("insert into vim_playlist4 (url, listnum) values 
(?, 1), (?, 2), (?, 3), (?, 4), (?, 5), (?, 6), (?, 7), (?, 8), (?, 9)");

$sql->execute(array($_POST["video1"], $_POST["video2"], $_POST["video3"],
    $_POST["video4"], $_POST["video5"] ,$_POST["video6"], $_POST["video7"],
    $_POST["video8"], $_POST["video9"]));

$dbh->commit();

---

非常感谢！我不太明白消毒的建议。我从MySQL查询切换到PDO系统，因为人们告诉我我很容易受到攻击，PDO就是解决方案。那么这怎么还不安全呢？我更新了php部分。它显示了清理数据的方法之一。