Question

I want to modify some $_SERVER[‘QUERY_STRING’]

$_SERVER['QUERY_STRING'] : "http://domain.com/blog/topics/post-name/uploads/flashfile.swf"

I want this output:        "http://domain.com/uploads/flashfile.swf"

So, the middle section “blog/topics/post-name/” need to be trimed. The actual words can change depends on which page the query_string is processed, especially the post-name is unpredicable.
How can I trim this middle section?

Edit: the flashfile.swf is just an example, it can be different names with different extention.

Answer 1

The easiest way is,

$url = "http://domain.com/blog/topics/post-name/uploads/flashfile.swf";
$str = str_replace($url, 'blog/topics/post-name/', '');

Here is a dynamic one.

$p = parse_url($url);
$v = basename($url);
$d = basename(dirname($url));
$str = $p['scheme']."://". $p['host']."/$d/$v";
echo $str;