Question

I’m trying to connect with the instagram API, the connection works fine and I am receiving the updates just as described in the API documentation, the issue is that I cannot access to the data send to my callback function.

According to the doc

When someone posts a new photo and it triggers an update of one of your subscriptions, we make a POST request to the callback URL that you defined in the subscription

This is my code :

// check if we have a security challenge
if (isset ($_GET['hub_challenge']))
            echo $_GET['hub_challenge'];  
    else // This is an update
    {
        // read  the content of $_POST
        $myString = file_get_contents('php://input');
        $answer = json_decode($myString);

        // This is not working  starting from here
        $id = $answer->{'object_id'};
        $api = 'https://api.instagram.com/v1/locations/'.$id.'/media/recent?client_secret='.INSTA_CLI_SECRET.'&client_id='.INSTA_CLI_ID;

        $response = get_curl($api); //change request path to pull different photos
        $images = array();

        if($response){
        $decode = json_decode($response);
        foreach($decode->{'data'} as $item){
             // do something with the data here
             }
        }
    }

Displaying the $myString variable I have this result, don’t know why it is not decoded to json 🙁

[{“changed_aspect”: “media”, “subscription_id”: 2468174, “object”:
“geography”, “object_id”: “1518250”, “time”: 1350044500}]

the get_curl function is working fine when I hardcode my $id.

I guess something is wrong with my $myString, unfortunately the $_POST cvariable is not populated, Any idea what I am missing ?

Answer 1

Looking at the example JSON response included in your question, I can conclude that the object you are trying to talk with is wrapped in an array (hence the [ and ] around it in the JSON string).

You should access it using $answers[0]->object_id.
If that doesn’t work, you can always use var_dump to check out the data in one of your variables.