Why such an error with an array?

Question

PHP

Help, I'm getting this error
Fatal error: Cannot use object of type stdClass as array in
Request I'm doing
$params = array(
'owner_id' => $group,
'offset' => "1",
'v' => "5.47" ,
'access_token' => $token
);
$array = send_vk_api("wall.get", $params);
//echo '';
//print_r($array);
$post_type = $array->response[1]->post_type;
$ads = $array->response[1]->marked_as_ads;
$id = $array->response[1]->id;
Here is what I get in response

stdClass Object ( [response] => stdClass Object ( [count] => 3847 [items] => Array ( [0] => stdClass Object ( [id] => 18005 [from_id] => -39209729 [owner_id] => -39209729 [date] => 1506952657 [marked_as_ads] => 0 [post_type] => post [text] => Женские футболки VOGUE http://ali.pub/1vi5l9 [attachments] => Array ( [0] => stdClass Object ( [type] => photo [photo] => stdClass Object ( [id] => 456239045 [album_id] => 248105613 [owner_id] => -39209729 [user_id] => 100 [photo_75] => https://pp.userapi.com/c837334/v837334105/61a12/UpjKkImGIHA.jpg [photo_130] => https://pp.userapi.com/c837334/v837334105/61a13/RJIgfvF6rCo.jpg [photo_604] => https://pp.userapi.com/c837334/v837334105/61a14/EAEam77Mhhg.jpg [photo_807] => https://pp.userapi.com/c837334/v837334105/61a15/TQLE1SVJRwo.jpg [photo_1280] => https://pp.userapi.com/c837334/v837334105/61a16/DWKY1fOP6uY.jpg [width] => 1000 [height] => 948 [text] => #Одежда #Стиль #Вкусно #НЕдорого #Футболка #Женская #ЖенскаяОдежда http://ali.pub/1vi5l9 [date] => 1506694328 [access_key] => ea1f90bf08ab292d93 ) ) [1] => stdClass Object ( [type] => photo [photo] => stdClass Object ( [id] => 456239046 [album_id] => 248105613 [owner_id] => -39209729 [user_id] => 100 [photo_75] => https://pp.userapi.com/c837334/v837334105/61a1b/55TBQWjZ__M.jpg [photo_130] => https://pp.userapi.com/c837334/v837334105/61a1c/2oG2pARQ_CI.jpg [photo_604] => https://pp.userapi.com/c837334/v837334105/61a1d/O2F5s8dXydo.jpg [photo_807] => https://pp.userapi.com/c837334/v837334105/61a1e/KdxlMICySUg.jpg [width] => 733 [height] => 736 [text] => #Одежда #Стиль #Вкусно #НЕдорого #Футболка #Женская #ЖенскаяОдежда http://ali.pub/1vi5l9 [date] => 1506694329 [access_key] => 6334c50329baf10bda ) ) [2] => stdClass Object ( [type] => photo [photo] => stdClass Object ( [id] => 456239047 [album_id] => 248105613 [owner_id] => -39209729 [user_id] => 100 [photo_75] => https://pp.userapi.com/c837334/v837334105/61a23/LiAHfSEtw5g.jpg [photo_130] => https://pp.userapi.com/c837334/v837334105/61a24/4vaz-_NSVTE.jpg [photo_604] => https://pp.userapi.com/c837334/v837334105/61a25/iDIaB_W3vQI.jpg [photo_807] => https://pp.userapi.com/c837334/v837334105/61a26/ODnIgmWBf8I.jpg [photo_1280] => https://pp.userapi.com/c837334/v837334105/61a27/P-Ry7-HPbEc.jpg [width] => 1000 [height] => 1000 [text] => #Одежда #Стиль #Вкусно #НЕдорого #Футболка #Женская #ЖенскаяОдежда http://ali.pub/1vi5l9 [date] => 1506694329 [access_key] => eab27ff3610cda2900 ) ) [3] => stdClass Object ( [type] => photo [photo]  => stdClass Object ( [count] => 0 [can_post] => 1 ) [likes] => stdClass Object ( [count] => 174 [user_likes] => 0 [can_like] => 1 [can_publish] => 1 ) [reposts] => stdClass Object ( [count] => 24 [user_reposted] => 0 ) ) ) ) )
Fatal error: Cannot use object of type stdClass as array in

These values

$post_type = $array->response[1]->post_type;
$ads = $array->response[1]->marked_as_ads;
$id = $array->response[1]->id;

already getting this error Fatal error: Cannot use object of type stdClass as array in