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

Question

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.

Answer 1

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.