如何通过手机号借助Facebook Graph API获取用户ID/用户名？

Straight to the point: No, there’s no Facebook Graph API endpoint that lets you pull a user’s ID, username, or profile link just by entering their phone number.

Here’s why this isn’t allowed: #

• Facebook’s privacy rules are strict when it comes to protecting user data. Looking up someone’s personal identifiers (like their user ID or profile) via their phone number would violate user privacy—unless you have explicit, authorized access to that user’s account or they’ve granted your app permission to access their data.
• Every Graph API endpoint that accesses user-specific data requires proper authentication (like a valid access token with the right permissions), and you can only get data for users who’ve given your app the green light to do so. You can’t look up random users by their phone number.

Alternatives to consider: #

• If your app needs to connect users via phone number, use Facebook Login with phone number authentication. When users log in this way, they’ll grant your app permission to access their basic profile data (if they agree), which you can then retrieve using the relevant Graph API endpoints.
• Always make sure you’re following Facebook’s Platform Policies and the Facebook Login permissions framework whenever you request user data.

内容的提问来源于stack exchange，提问作者Sandeep Singh