header（“Location：mypage.php”）在上传到其他服务器后无法正常工作

问题描述：

In my page I used header location for redirection in twitter login. But it is working fine in my server. But it is not working after uploaded the files to other server

header("Location: login-twitter.php");

When try to see what error in the page and used the below code, I see the following warning message.

error_reporting(E_ALL); ini_set('display_errors', 'On');

Warning: Cannot modify header information - headers already sent by (output started at /vhosts/www/samplehosts/mysite.com/samplefolder/header.php:258) in /vhosts/www/samplehosts/mysite.com/samplefolder/signin.php on line 24

The redirection is not working on any of the pages in my site. Anybody can help me to solve this problem

signin.php

if (array_key_exists("login", $_GET)) {

    $oauth_provider = $_GET['oauth_provider'];

    if ($oauth_provider == 'twitter') {

error_reporting(E_ALL); ini_set('display_errors', 'On'); 

        header("Location: login-twitter.php");

    }

}



<li class="twitter">
<a  class="twitter_login" href="?login&oauth_provider=twitter"  rel="nofollow">
<img src="images/twitter.png" width="206" height="33" >
</a>
</li>

But after click the twitter button just it shows the header URL as

http://mysite.com/?login&oauth_provider=twitter

and not redirecting to twitter login page.

在我的页面中，我使用标题位置在twitter登录中进行重定向。但它在我的服务器上工作正常。但是将文件上传到其他服务器 p>

header（“Location：login-twitter.php”）; code> p> \ n

当试图查看页面中的错误并使用下面的代码时，我看到以下警告信息。 p>


  error_reporting（E_ALL）;  ini_set（'display_errors'，'On'）;  
  code>  pre> 
 
 警告：无法修改标头信息 - 已经发送的标头（在/vhosts/www/samplehosts/mysite.com/samplefolder/header.php上输出
started：  258）在第24行的
 / vhosts / www / samplehosts / mysite.com / samplefolder / signin.php  p> 
 
 
重定向不适用于我站点中的任何页面。 任何人都可以帮我解决这个问题 p> 
 
 
  signin.php  strong>  p> 
 
 
  if（array_key_exists（“login”）  ，$ _GET））{
 
 $ oauth_provider = $ _GET ['oauth_provider']; 
 
 if（$ oauth_provider =='twitter'）{
 
error_reporting（E_ALL）;  ini_set（'display_errors'，'On'）;  
 
标题（“位置：login-twitter.php”）; 
 
} 
 
} 
 
 
 
＆lt; li class =“twitter”＆gt; 
＆lt; a class =  “twitter_login”href =“？login＆amp; oauth_provider = twitter”rel =“nofollow”＆gt; 
＆lt; img src =“images / twitter.png”width =“206”height =“33”＆gt; 
＆lt; / a＆gt;  ; 
＆lt; / li＆gt; 
  code>  pre> 
 
 但点击推特按钮后，只显示标题网址为 p> 
 
 
  http://mysite.com/?login&oauth_provider=twitter   p> 
 
  
而不是重定向到Twitter登录页面。 p> 
  div>

答

As per my understanding, your problem is that:

header("location:[XYX.PHP]") is not working.

It generally does not work due to some output is print already on the page. Please use

ob_start();

at very the beginning of the page. This starts output buffering. And the redirection works.

答

You can make sure your headers are always executed regardless of output by using an output buffer. Just do something like this at the top of your code:

<?php
ob_start();
// put any includes etc. here
// some other code
echo 'Sample output.';
header('Location: login-twitter.com');
// more code
ob_end_flush();
?>

In this case, because the output has been buffered, the header will still execute even though an echo statement is made before the call to header().

header（“Location：mypage.php”）在上传到其他服务器后无法正常工作

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