PHP get, modify and display incoming URL - php

Question

We are directing all incoming traffic in a directory to a specific page because not all content is ready. Traffic is being redirected to a specific page. It is what it is, and the URL structure aint pretty. I need to get the incoming URL - before the redirect, modify one part of it and display it on the page.
I can get the incoming URL like this
$incoming_link = "http://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";
which would ouput this: http://example.com/dir1/dir2/dir3/dir4-lang/Page.php
I need to take that url, and ONLY CHANGE the /dir4-lang/ to /dir4-newLang/ so the URL I display on the page would be http://example.com/dir1/dir2/dir3/dir4-newLang/Page.php
I think I'm on the right track but need some help with:
$url = "http://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";
$my_var = 'en-en';
$temp = explode( '/' , $url );
$temp[6] = $my_var;
$url = implode( '/' , $temp );
It is close but the incoming URL is http://example.com/dir1/dir2/dir3/dir4-lang/Foo.php and I am outputting

Answer 1

Try somthing like this:
$my_var = 'dir4-newLang';
$temp = explode( '/' , $_SERVER['REQUEST_URI'] );
$key = array_search('dir4-lang', $temp);
$temp[$key] = $my_var;
$last = count($temp) - 1;
$temp[$last] = strstr($temp[$last], '?');
echo $url = "http://$_SERVER[HTTP_HOST]" . implode( '/' , $temp );
So http://example.com/dir1/dir2/dir3/dir4-lang/Page.php?stuff gonna output http://example.com/dir1/dir2/dir3/dir4-newLang/?stuff