If you erase a backed up iphone, can you restore the data?

I have a glitch, and want to erase all data.
However, I want to restore the data afterwards; is that at all possible if the iPhone is backed up on a computer?

Maybe.

Yeah, but only if the phone has an up-to-date backup! I know it's a little scary 'cos you don't want to lose anything, but as long as you have a backup with all of your data you'll be fine.

You can manually transfer the data with an IPHONE app but if you didn't do that before the issue it's too late. When you connect the IPHONE to the PC it syncs up with ITUNES and all the apps are stored but the content within the apps is not backed up.

You will be able to restore the applications by running ITUNES, go to the app store option and click "purchased" on the right hand menu links. That will allow you to re download all the apps if you login with the account used to purchased those apps.

If you synced it, no need to go to the store section. Just sync it back up.