title: PHP Instagram friendships/create/ Error
body: <p>I trying to friendships/create/ function in Instagram but I've got some error.</p>
  
  <p>account/login function is working.</p>
  
  <p><strong>friendships/create Error: "Please update your Instagram app to continue following."</strong></p>
  
  <pre><code>require_once("instagram.php");
  $username = '';
  $password = '';
  $agent = 'Instagram 6.21.2 Android (19/4.4.2; 480dpi; 1152x1920; Meizu; MX4; mx4; mt6595; en_US)';
  $guid = GenerateGuid();
  $device_id = "android-".$guid;
  $data ='{"device_id":"'.$device_id.'","guid":"'.$guid.'","username":"'.$username.'","password":"'.$password.'","Content-Type":"application/x-www-form-urlencoded; charset=UTF-8"}';
  $sig    =   GenerateSignature($data);
  $data   =   'signed_body='.$sig.'.'.urlencode($data).'&amp;ig_sig_key_version=6';
  $login  =   SendRequest('accounts/login/', true, $data, $agent, false);
  print_r($login);
  
  /**********
  
  Login working successfully! No problem...
  
  ***********/
  
  /*********
  But error area is here.
  **********/
  
  $device_id = "android-".$guid;
  $data = '{"device_id":"'.$device_id.'","guid":"'.$guid.'","device_timestamp":"'.time().'","Content-Type":"application/x-www-form-urlencoded; charset=UTF-8"}';
  $sig            =   GenerateSignature($data);
  $new_data       =   'signed_body='.$sig.'.'.urlencode($data).'&amp;ig_sig_key_version=6';
  $follow         =   SendRequest('friendships/create/29180689', true, $new_data, $agent, true);
  </code></pre>
  
  <p>=== instagram.php ===</p>
  
  <pre><code>function SendRequest($url, $post, $post_data, $user_agent, $cookies) {
  
  $ch = curl_init();
  curl_setopt($ch, CURLOPT_URL, 'https://instagram.com/api/v1/'.$url);
  /*
  curl_setopt($ch, CURLOPT_PROXY, $proxy);
  curl_setopt($ch, CURLOPT_PROXYUSERPWD, $proxyauth);
  */
  curl_setopt($ch, CURLOPT_USERAGENT, $user_agent);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
  
  if($post) {
      curl_setopt($ch, CURLOPT_POST, true);
      curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
  }
  
  if($cookies) {
      curl_setopt($ch, CURLOPT_COOKIEFILE, 'cookies.txt');            
  } else {
      curl_setopt($ch, CURLOPT_COOKIEJAR, 'cookies.txt');
  }
  
  $response = curl_exec($ch);
  $http = curl_getinfo($ch, CURLINFO_HTTP_CODE);
  curl_close($ch);
  return array($http, $response);
  }
  function GenerateGuid() {
   return sprintf('%04x%04x-%04x-%04x-%04x-%04x%04x%04x', 
          mt_rand(0, 65535), 
          mt_rand(0, 65535), 
          mt_rand(0, 65535), 
          mt_rand(16384, 20479), 
          mt_rand(32768, 49151), 
          mt_rand(0, 65535), 
          mt_rand(0, 65535), 
          mt_rand(0, 65535));
  }
  function GenerateSignature($data) {
   return hash_hmac('sha256', $data, '25eace5393646842f0d0c3fb2ac7d3cfa15c052436ee86b5406a8433f54d24a5');
  }
  </code></pre>