Has Facebook sharer.php changed to no longer accept detailed parameters?

Question

We have been opening a sharing popup (via window.open) with the URL like

https://www.facebook.com/sharer/sharer.php?s=100&p[title]=EXAMPLE&p[summary]=EXAMPLE&p[url]=EXAMPLE&p[images][0]=EXAMPLE  

and until some unknown point in the last month or so everything was fine.

What is happening now is; the popup dialog appears and correctly includes the Title, Description, Image and URL provided by the query string parameters, but when the post is submitted, the resulting wall post on Facebook is missing the Title, Description and Image, though it still links to the correct URL.

Does anyone know if there have been recent changes which could have suddenly stopped this from working?

Pre-empting some common responses:

• "sharer.php URL was deprecated" - usage seemed to continue and it seemed the consensus was that it was largely considered to be sticking around - I haven't seen any specific indication that it should have suddenly ceased working - might have missed something

• "Use JavaScript SDK/these OG meta tags" - not possible in my specific situation - just trust me ... I can explain if you REALLY want but it's really not relevant.

• "Use the feed dialog" - not suitable due to lack of support for posting with attachments on FB pages

Answer 1

Facebook no longer supports custom parameters in sharer.php

The sharer will no longer accept custom parameters and facebook will pull the information that is being displayed in the preview the same way that it would appear on facebook as a post from the url OG meta tags.

Use dialog/feeds instead of sharer.php

https://www.facebook.com/dialog/feed?   app_id=145634995501895   &display=popup&caption=An%20example%20caption    &link=https%3A%2F%2Fdevelopers.facebook.com%2Fdocs%2Fdialogs%2F   &redirect_uri=https://developers.facebook.com/tools/explorer 

Official answer from fb team