Facebook Graph api get Posts starting from x post (PHP SDK) - php

Question

Hello i've serched a lot without find an answer to this.
is possible to retrieve Fb posts of a certain public page starting from a post id?(for example tomorrow start collecting posts from the last post of today)
Let's take for example Bill Gates page
the idea would be to do something similar to:
$id = 216311481960; //Bill's fb id
$last_post = 10153219939326961 // last bill posts
try {
$request= $id.'/posts?since='.$last_post.'&access_token=xxxxxxxxxxxxxxxxxxxx|xxxxxxxxxxxxxxx-xxxxxx';
$search = $fb->get($request);
if (isset($search)){
//do something
}
}
catch(Exception $e) {
echo 'Message: ' .$e->getMessage()."<h1>".$id."</h1>";
}
obviously since parameter has to be a date and that code wont work.
Any Idea?
Thanks in advance.
Edit
i try to search for all posts of a specific Facebook user starting not at a certain date but from a certain post, lets say that today i grab users postid1,postid2,postid3 (postid3 is the last post i've taken, and i save that id) next time i would to grab new posts published after postid3 (since postid3)

Answer 1

You can do it in the url, I just made it work recently. This is from a python code, but the URL should work the same way.
"https://graph.facebook.com/?ids=" + ids[:-1] +
"&fields=name,posts.limit(5).since(10+days+ago)" +
"{from,to,full_picture,message,caption,description," +
"link,name,shares,likes.summary(true)," +
"comments.summary(true),created_time,is_hidden," +
"message_tags,place,type,with_tags}")
This will get the last 5 posts from the last 10 days for several page ids. It will also get the total number of likes and comments as summary.
It took me a while to dig this info from the net, I found that since= has changed to since().
I tried to retrieve some reference where it's documented, so far with no success. I'll give you an update if I find it.