I'm a US citizen and need to go from the USA to Canada and back for a funeral. My passport's at home and not with me but I have an iPhone pic of my passport. Can I use this and my driver's license to cross borders? Also I have an iPhone pic of my birth certificate.
Unfortunately, no. Pictures on an iPhone of travel documents are not travel documents and won't be accepted. It's possible they could help get you back into the US as a citizen (after a long process at the border), but not to start your trip. You need the actual documents.
One possibility: if your driver's license is an "Enhanced Driver's License" issued by a couple of states, that will work for crossing the land US-Canada land border (not if you're flying).
Otherwise, you could have someone send you your passport from your home with overnight shipping.