I know an 'Elephant's ear' as Bergenia, and that is not a Bergenia.
However you may know a different plant as 'Elephant's ear' in America so I am probably of no help to you :)

Maybe someone will know what it is but it would be easier to identify if you waited for the flowers to open.

Thank you, @Hywel. I hope I can find out soon.. IDK elephant ears had flowers... I never seen them with flowers before.

Bergenia has pink flowers in late winter. I don't know if it's the same plant that you call Elephant ears. But this isn't Bergenia anyway.

It looks like some member of the Squash family, to me. Did your kids carve a jack o'lantern on the porch last Halloween?

I agree with Tugbrethil - It looks viney, so I'm going with cucumber.

Elephant Ear would be the Colocasia, which this is definitely not.

I don't have kids, at Tugbrethil. But I do toss pumpkins over the porch when they rott. Also do same when I refill the bird's food bowl. I toss out the previous seed. So this could be anything.. I did have Spaghetti Squash grow in my backyard twice before, however.

And yes, it has vines.