Can I find the location of someone using My Phone?∑

I suspect the question was the other way around and written ambiguously - to find someone else by using the iPhone in hand.

Sberry1950, to find someone you must have set up Find My and have their permission for their location to be displayed. See Follow a Friend's Shared Location in Find friends and share your location with Find My.

[Edited by Moderator]

Yes, you can see online where your phone is. To do this, log on to iCloud.com.

Possibly this support article will help you:

Locate a device in Find My iPhone on iCloud.com – Apple Support (UK)

You may well be right about that. The question can be read in two ways.