PHP:提供警报弹出窗口，然后重定向页面

问题描述

我是PHP新手.

当某人上传的文件太大时，我想向他们显示一个警告弹出窗口，并将其重定向到上一页(反之亦然).

When someone uploads a file size too big, I want to show them a warning popup and redirect them to a previous page (or vice versa).

if(file size is too big){
   ob_start();
   header("location:index.php");
   echo "<script type='text/javascript'>alert('Your File Size is too big!');</script>";
   ob_end_flush();
   exit;
}

上面的代码只会将我重定向到index.php，并且不会显示任何警告弹出窗口.

This code above will just redirect me to index.php and doesn't show any warning popup.

推荐答案

执行类似操作

header("Location: index.php?Message=" . urlencode($Message));

然后在index.php上...

Then on index.php...

if (isset($_GET['Message'])) {
    print $_GET['Message'];
}

换句话说，index.php将始终检查是否在url中传递了消息.如果有，则显示它.然后，只需在重定向中传递消息

In other words, index.php will always check if it's being passed a message in the url. If there is one, display it. Then, just pass the message in the redirect

如果您真的想使用模式弹出窗口，请生成js ...

if you really want to use a modal popup, generate the js...

if (isset($_GET['Message'])) {
    print '<script type="text/javascript">alert("' . $_GET['Message'] . '");</script>';
}

请注意，如果您在消息中使用引号，除非您将其转义，否则这将中断

Note that this will break if you use quotes in the message unless you escape them

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