I been in qatar twice. I did obtain my visa at the airport.Its good for a month but then you can extend it for certain days. You have to pay for extension.

As far as i knew you can obtain airport visa or upon arrival.But i've got american passport. I assume your from the philippines. I dunno if you can obtain airport visa or upon arrival visa. About visit visa. I dont have any idea.

Its based on my experienced only.

Goodluck!