在foreach循环中将元素添加到关联数组

Question

I'm creating my own API for an Android app but I cant seem to be able to solve this. (Note this is my first php project).

What I am trying to achieve is to add an element to an associative array and then encode it to JSON but instead the only thing I have achieved is to encode the JSON each time the loop repeats resulting in a bad formatted JSON.

This is the function with the loop

function checkLike($media_id, $user1_id, $access_token){

    $url = 'https://api.instagram.com/v1/media/'.$media_id.'/likes?access_token='.$access_token;

    $json1 = file_get_contents($url);

    $arr1 = json_decode($json1);

    $arr = array('media_id' => $media_id, 'hasLiked' => 0);


    if(is_array($arr1->data)){      
        foreach ($arr1->data as $key => $value) {
            //echo 'Comprobando el id '.$value->id.' deberia ser '. $user1_id.' ';

            if($value->id === $user1_id){
                $arr = array('media_id' => $media_id, 'hasLiked' => 1);
            }else{
                echo 'nope';
            }

        }encode_json($arr);
    }else{
        echo 'false1';
    }

}

and this is the other loop it's being called from

$json = file_get_contents('https://api.instagram.com/v1/users/self/media/recent/?access_token='.$token.'&count=5');

$arr = json_decode($json);



if (is_array($arr->data)) {
    foreach ($arr->data as $key => $value) {
        checkLike($value->id, get_user_id($user, $token), $token);
    }
}

However, the JSON I get is the following:

{"media_id":"1198059901794013237_483636171","hasLiked":0}
{"media_id":"1196611512178987610_483636171","hasLiked":1}
{"media_id":"1195162888588906891_483636171","hasLiked":1}
{"media_id":"1193726158308528216_483636171","hasLiked":1}
{"media_id":"1192260158916546943_483636171","hasLiked":1}

What do I have to do to get something like this?

{
   "photos":[
      {
         "mediaID":"1198059901794013237_483636171",
         "hasLiked":0
         }, {
         "mediaID":"1196611512178987610_483636171",
         "hasLiked":1
         }
   ]
}

Answer 1

Just replace this line:

json_encode($arr);

With:

json_encode(array("photos"=>$arr));