基于URL的可变PHP重定向

Question

i'm creating a index.php file for redirect all website to specific host I'd like create a little php script that read url and redirect based on specific filter.

for example: if url = (everything).domain1.com redir to default1.php if url = (everything).domain2.com redir to default2.php in all other case that not like first or second redir to default3.php

this is possible with php? i must use $_SERVER['HTTP_HOST'] or can I use other method?

Answer 1

i resolved with:

    <?php 
$domain = $_SERVER['SERVER_NAME'] . $_SERVER['REQUEST_URI']; 
if (strpos($domain,'domain-name.com') == true) {
    header('location: /index2.php');
    exit();
} else {
    header('location: /index3.php');
}
?>

but not redirect...