EE2 and PHP7 version

Hey!

I have an older client and haven’t kinda done anything web dev related now for years, but PHP version should be updated. Currently it is 5.6 and EE version is 2.

So, I tried to test EE2 with PHP 7, but didnt work just like that. Site went empty. Is there a way to get EE2 to work with PHP7 ? Should I configurate something first from the EE2 control panel?

Since I have to probably buy the license again for EE3 and client most likely doesn’t want that. In case I have to update the site to EE3 in order to get PHP7 work..