My iphone 4 doesn't charge anymore?

So this morning I woke up, my iphone was completely charged after spending the night charging, no problems. I was listening to music on the speakers, and I don't know if this may have any relation with my actual problem, but it bugged a few times like the music stopped and I couldn't access the volume anymore, I had to restart it at some point to fix that). A few hours later, I wanted to recharge it a bit before I leave the house, but it won't charge! I tried with many plug (In the wall, my radio, computer, car). My computer doesn't seem to detect it. When I play with the middle and the upper buttons, the logo that says that I need to plug it appears, even when it's plugged (It's dead now, but before that, it didn't do anything)

So, my phone always worked well before that, no jailbreak, nothing special happened between this morning and when I replugged it (No water, no drop), i've had it for about 1 1/2 year. It worked normally all day long except for the fact that it wouldn't charge. So what's going on?__.

I think there's a hardware problem.

Is the phone under warranty? If so you can get it fixed or get a new one at probably no cost. You can also go to the nearest Apple store. Call your cell phone network provider to obtain all of this info.

I'd see Apple about this.