URL has a # instead of a ?

I am trying to get a URL  that has a # sign instead of a ?

PHP Code:

http://staging.researchonline.com:8181/index.php/Configure#access_token=eyJraWQiOiJ4Q3VXZFVIRDBSNlJU 


I am trying to get the access_token. I tried using $_GET['access_token'] but that fails. Is there any way that I can see the entire URL so that I can "cut it up" with parse_url() and get the access_token? 

Parse_url requires the url. Where can I get that from?

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I tried using
$config['enable_query_strings'] = TRUE;
$config['access_token'] = '#';

But this results in access_token=NULL.
What am I doing wrong?

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