Facebook - get informations about shared post - facebook

Question

I get all posts from my group and I would like to publish it on my website.
When I shared something post from something fanpage - I can get everything informations about this post:
array(2) {
["data"]=>
array(11) {
[0]=>
array(13) {
["from"]=>
array(2) {
["name"]=>
string(20) "Franciszek Bonaparte"
["id"]=>
string(15) "120501615004257"
}
["name"]=>
string(11) "Funny Vines"
["description"]=>
string(25) "lol
Follow - Funny Vines"
["full_picture"]=>
string(144) "https://scontent.xx.fbcdn.net/hvthumb-xpf1/v/t15.0-10/12378449_1685955568343914_1258612246_n.jpg?oh=2878b7077fd0b69ed69a6ab1f08119d3&oe=572809E9"
["picture"]=>
string(153) "https://scontent.xx.fbcdn.net/hvthumb-xpf1/v/t15.0-10/p130x130/12378449_1685955568343914_1258612246_n.jpg?oh=43ce7f3fa54763e8dbe1fa91125a2fca&oe=57660849"
["story"]=>
string(87) "Franciszek Bonaparte udostÄpniĹ film uĹźytkownika Funny Vines w grupie Testowa Grupa."
["source"]=>
string(224) "https://video.xx.fbcdn.net/hvideo-xpl1/v/t42.1790-2/12744961_750810311722206_1464373469_n.mp4?efg=eyJybHIiOjg1NSwicmxhIjo1MTIsInZlbmNvZGVfdGFnIjoic3ZlX3NkIn0%3D&rl=855&vabr=475&oh=ccf857554a10954d543abd01b599e6b4&oe=56CC1335"
["created_time"]=>
string(24) "2016-02-21T11:16:32+0000"
["message"]=>
string(12) "test message"
["id"]=>
string(33) "1150748191602267_1155126047831148"
["likes"]=>
array(2) {
["data"]=>
array(0) {
}
["summary"]=>
array(3) {
["total_count"]=>
int(0)
["can_like"]=>
bool(true)
["has_liked"]=>
bool(false)
}
}
["comments"]=>
array(2) {
["data"]=>
array(0) {
}
["summary"]=>
array(3) {
["order"]=>
string(13) "chronological"
["total_count"]=>
int(0)
["can_comment"]=>
bool(false)
}
}
["attachments"]=>
array(1) {
["data"]=>
array(1) {
[0]=>
array(4) {
["media"]=>
array(1) {
["image"]=>
array(3) {
["height"]=>
int(640)
["src"]=>
string(144) "https://scontent.xx.fbcdn.net/hvthumb-xpf1/v/t15.0-10/12378449_1685955568343914_1258612246_n.jpg?oh=2878b7077fd0b69ed69a6ab1f08119d3&oe=572809E9"
["width"]=>
int(640)
}
}
["target"]=>
array(2) {
["id"]=>
string(16) "1271441132885072"
["url"]=>
string(71) "https://www.facebook.com/funnyvinesofficalpage/videos/1271441132885072/"
}
["type"]=>
string(12) "video_inline"
["url"]=>
string(71) "https://www.facebook.com/funnyvinesofficalpage/videos/1271441132885072/"
}
}
}
}
Here is screen of this post:
The problem is when I shared a post from user. I can't get any information about these post:
array(2) {
["data"]=>
array(12) {
[0]=>
array(6) {
["from"]=>
array(2) {
["name"]=>
string(20) "Franciszek Bonaparte"
["id"]=>
string(15) "120501615004257"
}
["created_time"]=>
string(24) "2016-02-21T11:20:50+0000"
["message"]=>
string(14) "test message 2"
["id"]=>
string(33) "1150748191602267_1155127894497630"
["likes"]=>
array(2) {
["data"]=>
array(0) {
}
["summary"]=>
array(3) {
["total_count"]=>
int(0)
["can_like"]=>
bool(true)
["has_liked"]=>
bool(false)
}
}
["comments"]=>
array(2) {
["data"]=>
array(0) {
}
["summary"]=>
array(3) {
["order"]=>
string(13) "chronological"
["total_count"]=>
int(0)
["can_comment"]=>
bool(false)
}
}
}
Here is screen of this post:
Why I can't get informations about author, shared post_id etc.? Here is my code:
$response = file_get_contents("https://graph.facebook.com/$group_id/feed?fields=from,name,shares,likes.summary(1),comments.summary(1),attachments,description,full_picture,picture,story,source,created_time,message&locale=pl_PL&limit=$limit&access_token=$token");
$array = json_decode($response, true);
Thanks for your help!