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php – Hashtag search in Facebook API

Posted by: admin July 12, 2020 Leave a comment


I am trying to find in Facebook API if they provide the HashTag search.

I meant I search in Facebook Query language and searched in Facebook Tool Explorer.

Any Idea ?

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How to&Answers:

Since April 30th and the introduction of Facebook api v2.0, public Post search is no longer available and will return :

  "error": {
    "message": "(#11) Post search has been deprecated", 
    "type": "OAuthException", 
    "code": 11

According to Facebook changelog v1.0 will continue to work until April 30th, 2015. As the search endpoint is back in the v2 doc, there is hope that they will reconsider the deprecation.

The search endpoint is a fulltext search, you just have to encode the hash (%23) and run your query through it :

Facebook API explorer :

You have to select v1.0 or Unversioned in the API version selector (on the top right)


Curl or whatever :

Just remove /v2.0/ from the url and call the unversioned API



There is currently no API for the hashtags feature on Facebook
There is a posts search function which will return some posts with a certain hashtag if you use that hashtag as the search string. But it will ignore the # tag.
There is a comment on one of the sites which says “you can change the # with the hex value from the ascii table (%23) to search for hashtags. but it will only find tags, created by the facebook homepage or official facebook applications.” Not sure how valid, you could try it
like this https://graph.facebook.com/search?q=%23myhashtag


There is no hashtag API available for Facebook and using %23 for #(hash) is the only solution as of now which already everyone here has commented upon.

I’m not too sure about FQL being deprecated in near future as I could see different opinions across the board.


As I am understanding you would use Keyword Insights API
Though as mentioned on the following link

Access to the Keyword Insights API is restricted to a limited set of
media publishers and usage requires prior approval by Facebook. You
cannot apply to use the API at this time.


Take note on the mention of hashtag searching in the “best practices” section.