Json и php

        $json = file_get_contents('http://www.sitename.ru/url');
        $media = json_decode($json);
        $liked = $media->media->likes->viewer_has_liked;

$liked

<?php
        //Enter your code here, enjoy!
 
$json = '{"media": {"caption_is_edited": false, "code": "BHsovvKBeH0", "dimensions": {"width": 1080, "height": 805}, "usertags": {"nodes": []}, "comments_disabled": false, "comments": {"count": 0, "page_info": {"has_previous_page": false, "start_cursor": null, "end_cursor": null, "has_next_page": false}, "nodes": []}, "is_ad": false, "owner": {"username": "clatsclats11", "full_name": "\u0418\u0432\u0430\u043d \u0418\u0432\u0430\u043d\u043e\u0432", "requested_by_viewer": false, "followed_by_viewer": false, "has_blocked_viewer": false, "profile_pic_url": "https://scontent-amt2-1.cdninstagram.com/t51.2885-19/11906329_960233084022564_1448528159_a.jpg", "is_unpublished": false, "blocked_by_viewer": false, "id": "3458468503", "is_private": false}, "likes": {"count": 1, "viewer_has_liked": true, "nodes": [{"user": {"username": "clatsclats11", "profile_pic_url": "https://scontent-amt2-1.cdninstagram.com/t51.2885-19/11906329_960233084022564_1448528159_a.jpg", "id": "3458468503"}}]}, "date": 1468189118, "is_video": false, "id": "1291586395458363892", "display_src": "https://scontent-amt2-1.cdninstagram.com/t51.2885-15/e35/13658743_257217044663834_1932524429_n.jpg?ig_cache_key=MTI5MTU4NjM5NTQ1ODM2Mzg5Mg%3D%3D.2", "location": null}}';
$media = json_decode($json);
$liked = $media->media->likes->viewer_has_liked;
var_dump($liked);

<?php
        //Enter your code here, enjoy!
 
$json = '{"media": {"caption_is_edited": false, "code": "BHsovvKBeH0", "dimensions": {"width": 1080, "height": 805}, "usertags": {"nodes": []}, "comments_disabled": false, "comments": {"count": 0, "page_info": {"has_previous_page": false, "start_cursor": null, "end_cursor": null, "has_next_page": false}, "nodes": []}, "is_ad": false, "owner": {"username": "clatsclats11", "full_name": "\u0418\u0432\u0430\u043d \u0418\u0432\u0430\u043d\u043e\u0432", "requested_by_viewer": false, "followed_by_viewer": false, "has_blocked_viewer": false, "profile_pic_url": "https://scontent-amt2-1.cdninstagram.com/t51.2885-19/11906329_960233084022564_1448528159_a.jpg", "is_unpublished": false, "blocked_by_viewer": false, "id": "3458468503", "is_private": false}, "likes": {"count": 1, "viewer_has_liked": true, "nodes": [{"user": {"username": "clatsclats11", "profile_pic_url": "https://scontent-amt2-1.cdninstagram.com/t51.2885-19/11906329_960233084022564_1448528159_a.jpg", "id": "3458468503"}}]}, "date": 1468189118, "is_video": false, "id": "1291586395458363892", "display_src": "https://scontent-amt2-1.cdninstagram.com/t51.2885-15/e35/13658743_257217044663834_1932524429_n.jpg?ig_cache_key=MTI5MTU4NjM5NTQ1ODM2Mzg5Mg%3D%3D.2", "location": null}}';
$media = json_decode($json);
$liked = $media->media->likes->viewer_has_liked;
 
$liked = var_export((bool)$liked,1);
 
echo $liked;