Is it ok to use a iphone 5 while charging? Will it explode? Got the charger and phone from Apple?

Is it. I heard if exploding phones from charging and using it and now I'm scared to do that again. My iPhone 5 is a couple months old now

That's BS. I've had an i5 for a couple of years, used it several times while it was charging and had no problems. Besides there's no reason for it to do that anyway. Whoever told you that doesn't know what they;re talking about.

No it doesn't explode I use my ipad whilst charging.
But I wouldn't recommend having a extension plug sockets and put too many things in and using it.