PHP code

Hi guyz

I found this code :

http://pastebin.com/gK4qTxVy

This is to check the mysql connection, the problem is this checks the DB connection internally only. I mean you need to upload this file to the server and check the connection, what i want is where i can externally check the connection.. Meaning if i host this php in my server, i should be able to check any db connection by providing the server name or server ip. Currently if I do this it says access denied in my local server. anyone can guide?

Thanks