标头位置延迟 [英] header location delay

问题描述

我有以下php代码，我也想添加一个延迟:

I have the following php code which I want to add a delay too:

<?php
    echo "Message has been sent.";
    header("Location: page2.php", true, 303);
    exit;
?>

上面的代码发生的太快了，所以我看不到消息:

The above code happens too fast so I can't see the message:

我尝试过:

<?php
    sleep(5);
    echo "Message has been sent.";
    header("Location: page2.php", true, 303);
    exit;
?>

这也不显示消息，但是它会休眠5秒钟，这只是浪费时间.

This doesn't display the message either, but it does sleep for 5 seconds, which is just a waste of time.

我如何在重定向之前将其显示5秒钟的消息?

How do I get it to display a message for 5 second before redirecting?

推荐答案

您无法使用HTTP位置重定向来执行此操作，因为这种重定向将在浏览器获取标头后立即进行.而是在标头中使用刷新重定向:

You cannot do this with a HTTP location redirect, as this redirect will happen as soon as the browser gets the header. Instead, use a refresh redirect in the header:

header( "Refresh:5; url=http://www.example.com/page2.php", true, 303);

该应该可以在现代浏览器上运行，但是它尚未标准化，因此要获得等效的功能，请使用元刷新重定向(这意味着您也必须输出完整的HTML) :

This should work on modern browsers, however it is not standardized, so to get the equivalent functionality would be do use a meta refresh redirect (meaning you'd have to output a full HTML too):

<meta http-equiv="refresh" content="5;url=http://www.example.com/page2.php"> 

来自 Wikipedia页面:

用于重定向，或在创建新资源时使用.这 X秒钟后刷新重定向.这是专有的非标准 标头扩展是Netscape引入的，并且大多数Web都支持 浏览器.

Used in redirection, or when a new resource has been created. This refresh redirects after X seconds. This is a proprietary, non-standard header extension introduced by Netscape and supported by most web browsers.

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