Re: Phone shut off on its own over night and wont turn back on even on charger
Was it on a charger at the time?
Is it an Apple supplied, OEM or certified "made for i" charger and cable? If not - try those first... and if not, something may have happened that will require replacing the charging port at the very least - or the device may be beyond repair... you'll have to find a place that can diagnose and provide you with available options.