What happens if I charge my iphone for 2 months straight?

I'm going into the military and didn't know if I should just leave it on the charger or let it die. Also will I still get texts and stuff if I say have it dead it june and then in august I turn it all will I get bombarded with texts? Will it hurt my phone if I leave it on the charger for 2 months straight?

The phone's charging circuit will cut off once the battery has reached its full charge.

Bigger electricity bill

Leave it with a trusted family member. Ask them to keep an eye on the charge level and charge it when necessary. That would be best.