Bug Subscription instagram API with cURL - php

Question

Here is my code to subscribe/unsubscribe to an real time of Instagram API.
The unsubscribe works but not the subscribe. Im not really good with cUrl, I just have use this part of code from http://thegregthompson.com/instagram-real-time-api-php/ with some extra customization.
<?php
$url = "https://api.instagram.com/v1/subscriptions/";
$ch = curl_init();
if (isset($_GET['unsubscribe']))
{
echo "unsubscribe";
$url .= "?client_id=" . $config['instagram']['client_id'] . "&client_secret=" .
$config['instagram']['client_secret'] . "&id=" . $_GET['tag'];
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "DELETE");
}
else
{
$attachment = array(
'client_id' => $config['instagram']['client_id'],
'client_secret' => $config['instagram']['client_secret'],
'object' => 'tag',
'object_id' => $_GET['tag'],
'aspect' => 'media',
'verify_token' => $config['instagram']['verify_token'],
'callback_url'=> 'http://' . $_SERVER['HTTP_HOST'] . '/callback/endpoint.php'
);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
curl_setopt($ch, CURLOPT_POSTFIELDS, $attachment);
curl_setopt($ch, CURLOPT_POST, true);
}
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); //to suppress the curl output
$result = curl_exec($ch);
curl_close ($ch);
print_r($result);
?>
$config is correctly included.
I spent so much time to try to fix it but no way.
Can you please help me to make the subscription works ?
Ask me if you need more details.
Thanks a lot

Answer 1

Ok, I fixed it: I think we should set the CURLOPT_POST before CURLOPT_POSTFIELDS
Correct
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $attachment);
Incorrect
curl_setopt($ch, CURLOPT_POSTFIELDS, $attachment);
curl_setopt($ch, CURLOPT_POST, true);