$ch = curl_init('
https://www.instagram.com/it_cube/?__a=1');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$res = curl_exec($ch);
$obj = json_decode($res, true);
for ($i=0; $i<=11; $i++){
echo $i.' поcт'.'<br>';
echo $obj["graphql"]["user"]["edge_owner_to_timeline_media"]["edges"][$i]["node"]["edge_media_to_caption"]["edges"][0]["node"]["text"].'<br>';
}