How to extract session ID from URL? - php

Question

Hi is it possible to get embedded session id from url using php?
From the root url, http://www.sbstransit.com.sg/mobileiris/, the website will generate a session id which is between the url and become something like that.
i.e http://www.sbstransit.com.sg/mobileiris/(ts2k1e55xaah50iwodsvjy35)/index.aspx.
Isit possible to use php/any other ways to retrieve "ts2k1e55xaah50iwodsvjy35" out by querying the root url without actually physically going into the url?

Answer 1

If you use wget to get that page, you'll see:
...
HTTP request sent, awaiting response... 302 Found
Location: http://www.sbstransit.com.sg/mobileiris/(xidluk550vzs5045l1cxkh55)/index.aspx [following]
Which indicates that it is doing a 302 redirect to the URL containing the ID.
You can write Perl (or other) code to find the redirected URL:
#!/usr/bin/perl
use warnings;
use strict;
use LWP::UserAgent;
my $ua = LWP::UserAgent->new;
$ua->requests_redirectable([]); # don't follow any redirects
my $response = $ua->get('http://www.sbstransit.com.sg/mobileiris/');
my $loc = $response->header('Location');
print "redirected to=$loc\n";

Answer 2

<?php
$url = 'http://www.sbstransit.com.sg/mobileiris/(ts2k1e55xaah50iwodsvjy35)/index.aspx';
$url_arr = parse_url($url);
print_r($url_arr); // debug output
$tokens = explode('/', $url_arr['path']);
print_r($tokens); // debug output
?>
Output:
Array
(
[scheme] => http
[host] => www.sbstransit.com.sg
[path] => /mobileiris/(ts2k1e55xaah50iwodsvjy35)/index.aspx
)
Array
(
[0] =>
[1] => mobileiris
[2] => (ts2k1e55xaah50iwodsvjy35)
[3] => index.aspx
)
So you could get your session id with $tokens[2]