How to determine user data from social networks knowing the phone or email?

Question

PHP

Hello dear gurus. Do not tell me how you can determine the user's data knowing his email or phone number from social networks.
There is a list of data and you need to somehow pick up user information with a php script, if any. First name last name link to profile.
Maybe someone came across and can suggest a general algorithm of actions.

Answer 1

https://vk.com/dev/account.lookupContacts