html文档中的标题无法正常工作 - 新服务器

Question

I moved my documents to a new host and the headers stopped working(refresh,redirect,etc).They used to work in my old server.I have googled and tried adding a ob_start before sending headers, that did not work.

Here is a part of the code...

if(isset($_GET['reflink']))
                        {
                            echo '<h3>Already Logged In<h3><p>Please logout before registering an account.Redirecting you back to where you came from...';
                            header('Refresh: 3; url="http://www.xacnr.com'.$_GET['reflink'].'"');
                        }

*It used to work before, it must be a problem with the server settings or something :|

Answer 1

A short answer is:

It is not possible to send http headers after the output of anything else.

So if you want to output headers, you must do this at the beginning of your output. To be even more precise: HTTP-Headers must be the first thing of your output, if you have to send them - before anything else.

Please read the documentation: http://www.php.net/manual/en/function.header.php http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html

Please be also aware of the fact that the Refresh-Header is AFAIK not part of the official HTTP-Standard. It's a jurassic artifact from Netscape which will be still accepted and interpreted by most browsers, but this may change even without special notice.

If you need such a refresh and if you want to stay on the safe side, you should consider using the Meta-Refresh within the HTML-Header.

Please read here: http://en.wikipedia.org/wiki/Meta_refresh

BTW: It's also a bad idea to use unsanitized, unprocessed values from $_GET, $_POST etc. Your example should never be used in any public available environment.