无法使用提供的PHP API从Instagram获取图像

I am trying to the Instagram PHP API to get friends photos. I registered as a sandbox user as well as a dummy user with few random images posted.Then, I invited the dummy user to grant the app in sandbox to connect his account.

To get access token I send a request to get code and then get access token with scope:

https://api.instagram.com/oauth/access_token?client_id=CLIENT_ID&client_secret=SECRET_STRING&grant_type=authorization_code&redirect_uri=http://localhost/&code=CODE&scope=basic+public_content+comments+likes`

PHP code:

$url = 'https://api.instagram.com/oauth/access_token';
    $payload = [
            $GLOBALS['KEY_CID'] => $GLOBALS['VAL_CID'],
            $GLOBALS['KEY_CECRET'] => $GLOBALS['VAL_CECRET'],
            'grant_type' => 'authorization_code',
            'redirect_uri' => 'http://localhost/',
            'code' => $param_code,
            'scope' => 'basic+public_content+comments+likes'];

$ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url); // url
        curl_setopt($ch, CURLOPT_POST, true); // POST
        curl_setopt($ch, CURLOPT_POSTFIELDS, $payload); // POST DATA
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); // RETURN RESULT true
        curl_setopt($ch, CURLOPT_HEADER, 0); // RETURN HEADER false
        curl_setopt($ch, CURLOPT_NOBODY, 0); // NO RETURN BODY false / we need the body to return
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0); // VERIFY SSL HOST false
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0); // VERIFY SSL PEER false
$response = json_decode(curl_exec($ch), true);
curl_close($ch);

After I got access token successfully.

I try to get images from a sandbox user which is a dummy account I created for testing:

https://api.instagram.com/v1/users/fane.leee/media/recent?access_token=ACCESS_TOKEN

PHP code for retrieving image:

$url = 'https://api.instagram.com/v1/users/fane.leee/media/recent?access_token='.$ACCESS_TOKEN;
    $ch = curl_init(); // initializing
    curl_setopt( $ch, CURLOPT_URL, $url ); // API URL to connect
    curl_setopt( $ch, CURLOPT_RETURNTRANSFER, 1 ); // return the result, do not print
    curl_setopt( $ch, CURLOPT_TIMEOUT, 30 );
    $response = json_decode(curl_exec($ch), true); // connect and get json data
    curl_close($ch);

The problem
The $response of the get image request is NULL without error message. Anyone got any ideas about the problem?

Thanks.

Reference

  1. Instagram development doc authentication and authorization.

  2. Instagram development doc about user endpoints

  3. Another StackOverflow post about Instagram web API

Development environment: Ubuntu 16.04
Apache2
PHP 7.0.8
MySQL 14.14

Edit 1: Add the PHP code calling cUrl functions.
Edit 2: If I replace the user id 'fane.leee' by using 'self', I am able to retrieve the images I posted. I also followed the user 'fane.leee'. Any else I should do to retrieve the friends' media?

The fane.leee is a username. Instagram requires a user id in the API caller.

To get a user id by calling a instagram API function, we could use
https://www.instagram.com/{username}/?__a=1

Another way to get the user id is to use a 3rd party website. It is able to retrieve an Instagram user id from a username. It is here

Reference:
An answer from Thinh Vu in this thread - Not the accepted answer, but the answer underneath. P.S the accepted answer is not working anymore.