PHP重定向基于同一域内的HTTP_HOST / SERVER_NAME

Question

I am trying to redirect to a specific path based on HTTP_HOST or SERVER_NAME with a PHP-script.

I have tried these scripts:

1.

$domain = $_SERVER["SERVER_NAME"];
if (($domain == "example.dk") ||
   ($domain == "www.example.dk")) { 
   header("location: /index.php/da/forside"); 
}
?>

2.

switch ($host) {

        case 'example.dk':
                header("HTTP/1.1 301 Moved Permanently");
                header("Location: http://www.example.dk/index.php/da/forside/");
                exit();

        case 'www.example.dk':
                header("HTTP/1.1 301 Moved Permanently");
                header("Location: http://www.example.dk/index.php/da/forside/");
                exit();



        default:
                header("Location: http://www.example.se");
                exit();

                }
?>

And other similar scripts. Either the page loads forever or the browser returns some redirection error.

Answer 1

Ok, this is how I solved it:

<?php
$domain = $_SERVER["SERVER_NAME"];
$requri = $_SERVER['REQUEST_URI'];
if (($domain == "www.example.dk" && $requri == "/index.php"  ||
   $domain == "example.dk") )  { 
   Header( "HTTP/1.1 301 Moved Permanently" ); 
   header("location: http://www.example.dk/index.php/da/forside"); 
}

else if (($domain == "uk.example.dk" && $requri == "/index.php"  ||
   $domain == "www.uk.example.dk") )  {
   Header( "HTTP/1.1 301 Moved Permanently" );    
   header("location: http://uk.example.dk/index.php/en/uk/home"); 
}

else if (($domain == "www.example.se" && $requri == "/index.php"  ||
   $domain == "example.se") )  { 
   Header( "HTTP/1.1 301 Moved Permanently" ); 
   header("location: http://example.se/index.php/sv/hem"); 
}

?>

It appears I need the REQUEST_URI field, otherwise it wouldn't work.

Answer 2

The most common redirection error is a redirection loop.

1. Does the script really end after your first example?
2. Where does $host come from?

Also, SERVER_NAME is usually an apache configured global name, HTTP_HOST is really the right way to do this.

HTTP_HOST may contain the port number, keep this in mind.

So what's the url of your script, and where are you redirecting to?

A simple way to debug is to echo the contents of HTTP_HOST and instead of calling header(), also call 'echo'.

Answer 3

Because your are redirecting to the same server (example.dk) and your code executes again and again in a loop.

use this code instead:

$domain = $_SERVER["SERVER_NAME"];
if (($domain == "example.dk" ||
   $domain == "www.example.dk") && !$_GET['redirected'])  { 
   header("location: /index.php/da/forside?redirected=1"); 
}