How to recognize Facebook User-Agent

by

For list of user-agent strings, look up here. The most used, as of September 2015, are facebookexternalhit/* and Facebot. As you haven’t stated what language you’re trying to recognize the user-agent in, I can’t tell you more information. If you do want to recognize Facebook bot in PHP, use 

if (
    strpos($_SERVER["HTTP_USER_AGENT"], "facebookexternalhit/") !== false ||          
    strpos($_SERVER["HTTP_USER_AGENT"], "Facebot") !== false
) {
    // it is probably Facebook's bot
}
else {
    // that is not Facebook
}

UPDATE: Facebook has added Facebot to list of their possible user-agent strings, so I’ve updated my code to reflect the change. Also, code is now more predictible to possible future changes.

More Related Contents:

  1. Hi! I have an issue: Shopify instagram sales channel
  2. Facebook Graph API v2.0+ – /me/friends returns empty, or only friends who also use my application
  3. Facebook API error 191
  4. Facebook Callback appends ‘#_=_’ to Return URL
  5. Warning: Each child in an array or iterator should have a unique “key” prop. Check the render method of `ListView`
  6. Facebook Oauth Logout
  7. Facebook Graph Api – Posting to Fan Page as an Admin
  8. How do you post to the wall on a facebook page (not profile)
  9. Fetching list of friends in Graph API or FQL – Appears to be missing some friends
  10. Get user profile picture by Id
  11. How to get friend’s birthday list using facebook api?
  12. How to get all the user IDs of people who are using your Facebook application
  13. How to post on a friend’s Timeline after the February 2013 migration takes effect?
  14. Generate “never-expire” access token for Facebook Page
  15. Omniauth Facebook Error – Faraday::Error::ConnectionFailed
  16. Facebook login “given URL not allowed by application configuration”
  17. How can we track hashtags with the new facebook hashtag implementation
  18. Do Facebook Oauth 2.0 Access Tokens Expire?
  19. Facebook Graph API – how to get user country?
  20. Deeplink solution for IOS and Android apps works in Facebook
  21. How can I post new comment with Graph API into Social Comments Box?
  22. How to clear Facebook Sharer cache?
  23. Why does Facebook Graph API say my account is non-active?
  24. How do I test the Facebook “Like” button on localhost?
  25. How to subscribe to real-time updates for a Facebook page’s wall
  26. Allowing multiple domains for 1 Facebook App (like Tumblr)
  27. Facebook Apps: Additional permissions
  28. Check if user is logged in New Facebook API
  29. Facebook share link without JavaScript
  30. Unable to get access token from Facebook. Got an OAuthException says “Error validating verification code”

Leave a Comment