Javascript php脚本中的Javascript警报
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Javascript alert in php script
提问by user893970
I wanted to popup an alert box. After that, the site would redirect to main page. But, it seems that it directly redirect to the mainpage without alerting anything.
我想弹出一个警告框。之后，该站点将重定向到主页。但是，它似乎直接重定向到主页而不发出任何警报。
if($registerquery)
{
?>
<script>alert('received!')</script>
<?php
}
header("Location: mainpage.php");
exit();
?>
I wanted to do this to ensure users that the process of submission ended successfully. How can i alert something before the page redirect to mainpage and more importantly what causes this? I think the page should not have redirected before the alert box.(Before these codes, site registers what users submitted but not relevant i guess.)Thanks
我想这样做是为了确保用户提交过程成功结束。如何在页面重定向到主页之前发出警报，更重要的是是什么导致了这种情况？我认为页面不应该在警告框之前重定向。（在这些代码之前，站点注册了用户提交但不相关的内容，我猜。）谢谢
回答by Niet the Dark Absol
You just can't do this. PHP is server-side, JS is client-side. Using a location header is server-side, so the browser never gets the JS.
你不能这样做。PHP是服务器端，JS是客户端。使用位置标头是服务器端的，因此浏览器永远不会获取 JS。
Instead, try something more like:
相反，尝试更像：
if( $registerquery)
echo "<script>alert('received!'); location.href='mainpage.php';</script>";
and remove the headerbit altogether.
并header完全删除该位。
