Trevor

I have a Mac, and something strange is happening with Firefox.

Whenever I would go to some popular website (e.g. Facebook, Google, Youtube), I would instead see a different website. This has happened several times. The first time I wanted to go to Youtube, but instead I saw some anime site. The web address still said youtube.com, but the site was completely different. Another time I tried to go to Facebook, but instead Twitter was on the page. With Google, I saw Adobe. And now, Facebook redirects to Careerbuilder.

When this happens it only happens for a day or so, and then it's back to normal. It seems to only be a problem with Firefox, as Safari still goes to Facebook normally. https allows me to go to Facebook in Firefox, but I don't understand what might be redirecting me.

At first I thought it was my router, so I changed the password. I've run McAfee to find any viruses, but no luck. Now I'm out of ideas. Can anyone help?

I had a friend helping me do this, but he is being extremely slow so I'm trying to figure it out myself.

I want to set up a free php server that you can send a username to, receive a question specific to that user, then send the response back to the server.

Here's what my friend did, but as I said, I'd like to learn how to do it on my own:

http://rsdealings.com/trevor/auth.php?username=tlu...

http://rsdealings.com/trevor/question.php?username...

Can anyone help? I've never used PHP before, so I'll need instructions from the bottom up. I'm sure I could figure out the actual language, but it's the server I'm having trouble with.