Php - parsing url to friendly (Using regexp)

Question

Using regex I need convert this string url.

<a class="navPages" href="?mode=author&amp;id=9&amp;word=friend&fn=%d">%s</a>

To get a output format like this:

<a class="navPages" href="author/9/friend/page/%d>%s</a>

Or get result:

0:autor
1:9
2:friend
3:%d

How should I write the regexp?

Answer 1

Replace all between (& or ?) and = with /:

$link = preg_replace("/[&?][^=]*=/", "/", $link);

Result: author/9/friend/%d

To get the parts in array, use the same regexp with preg_split:

$parts = preg_split("/[&?][^=]*=/", $link);

Note that first element will be empty with this approach -- result:

array(5) {
  [0]=> ""
  [1]=> "author"
  [2]=> "9"
  [3]=> "friend"
  [4]=> "%d"
}