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Print screen shot... View of the content being... There...

In this case, he is asking you to open options.php up in a text editor. And copy and paste the contents into a reply box... At least I think he means that.

How to prevent this?
Well a number of ways.

1. Changing your password every X amount of days.
2. Directory Password Protecting the AdminCP
3. Setting your ADMIN user from being modified in the config.php
4. My personal favourate: Rename the AdminCP folder, and telling config.php where and what the new one is, and preform Step 2 on that folder. Then make a blank folder called admincp with a blank index.php in there. [Make sure this AdminCP is passworded too. It pisses hackers off to see a passworded area with nothing in it. Lol!] Remember when doing upgrades to put them in the new folder and ignore the line "Upload AdminCP contents to Admincp on the site" upload it to the personal folder.
5. Having only one person who is an Administrator.
6. Having a really long or complex password. My favourate [WHICH IS MY OLD ONE] was "Mary had a little lamb." It had caps, spaces, fullstop/ period, etc.... Simple. But it worked!

Those are my suggestions. They worked for me. But hey. What would I know, right? I've been running forum software for over 10 years and never ever been hacked once. Ever.