How to identify a segment or id in URL?

alfonsomr

I have this three URLs:
- http://www.facebook.com/group.php?gid=123
- http://www.facebook.com/pages/pagetitle/321
- http://www.facebook.com/xyz

I need to identify in any of these case which is the id at the end (in the first two) and If the third case, which is the first segment ("xyz" in this example).

The first case will always have the "group.php?gid=" string and the second case will always have the "/pages/" string.

At the end what I need is:
$id = 123; // 1st case or
$id = 321; // 2nd case or
$id = xyz; // 3rd case

laserlight

You can use [man]parse_url/man to get the query string and the path. You then use [man]parse_str/man on the query string and see if there is a name/value pair for which the name is 'gid'. If not, you turn your attention to the path, extracting from it the last component, perhaps by using a regular expression or [man]explode/man.

alfonsomr

I will try this, thank you!

NogDog

You could also use [man]basename/man for getting whatever follows the last "/".