Is it okay to leave your iPhone 5 in the car?

I leave it in the car today for like 6 hour and half. Is it okay to leave
It on the car when it's hot. When I though the phone it feel hot. So is it okay to leave it in the car? Does it effect it?

It's fine, the phone does get warm on its own sometimes when downloading large things, but leaving it in the sun is just heating the metal, I wouldn't push it but it won't have any effects.

Try not to. It could ruin the battery although the aluminum design dissapates heat quite well

I guess it is fine, but why do that?