在重定向之前更改URL中的字母

Question

I'm trying to grab the current pages URL and change some values in it before redirecting to the next page with header()

If my current url is http://example.com/abc-def-1-xxx-g.php I want to change the xxx part to a so my url will then be http://example.com/abc-def-1-a-g.php

Heres what I have for the header on the xxx page before redirect

header("Location: whattoputhere.php?". $_SERVER['QUERY_STRING']);

Answer 1

This should work for you:

$str = "http://example.com/abc-def-1-xxx-g.php";
$url = str_replace("xxx", "a", $str);

//For example
echo $url;

Output:

http://example.com/abc-def-1-a-g.php

EDIT:

To grab the current URL use this:

$str = "http://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";

Also don't forget to use exit() after each header so you are sure the script stops to be executed like this:

header("Location: $url");
exit();