I developped months ago a page to automatically post on my 2 Facebook pages. I could post just a message but also add a link and/or a picture. Everything worked like a charm and my latest post was succesfull the 25th of Nov. Today, I try to publish a news with just a picture and I received an error 100# message which says : "A link must be provided if a picture URL is given".
I can't find any explaination nor help on this subject. It seems that Facebook changes its rules concerning the publication of pictures.
Basically here is the error dump :
FacebookApiException Object
(
[result:protected] => Array
(
[error] => Array
(
[message] => (#100) A link must be provided if a picture URL is given.
[type] => OAuthException
[code] => 100
[fbtrace_id] => xxxxxxxxxxxx
)
)
[message:protected] => (#100) A link must be provided if a picture URL is given.
[string:Exception:private] =>
[code:protected] => 0
[file:protected] => /mypathtofacebook/base_facebook.php
[line:protected] => 1042
[trace:Exception:private] => Array
(
[0] => Array
(
[file] => /mypathtofacebook/base_facebook.php
[line] => 747
[function] => throwAPIException
[class] => BaseFacebook
[type] => ->
[args] => Array
(
[0] => Array
(
[error] => Array
(
[message] => (#100) A link must be provided if a picture URL is given.
[type] => OAuthException
[code] => 100
[fbtrace_id] => xxxxxxxxxxxxxxxxx
)
)
)
)
[1] => Array
(
[function] => _graph
[class] => BaseFacebook
[type] => ->
[args] => Array
(
[0] => /mypageid/feed
[1] => post
[2] => Array
(
[access_token] => myaccesstoken
[from] => myAPPid
[message] => blabla
[picture] => http://www......................jpg
[to] => mypageid
The only thing that changed is that I had to change my FB password. So my access_token was no longer valid and I generated a new one. I used the same process to get this new access_token and I can post on Pages. But once again, only text and link, but no picture alone anymore.
Another info: I try to repost the same picture that the one posted the 25th of Nov and I have the error. So it's definitely not an error in the picture URL or in the image itself.
Thanks in advance
https://developers.facebook.com/docs/graph-api/reference/v2.5/page/feed#publish
Posting a picture requires a link - the picture is actually the "preview image associated with the link". You can also post to the /page-id/photos endpoint if you want to post a picture without a link.