PHP: Facebook Send Button Metrics via Graph API

send_button_metrics.php

<?php
/***
Facebook Send Button Metrics via Graph API

Originally posted on Facebook Developer Blog by Zhen Fang.

Source: http://developers.facebook.com/blog/post/501
***/

  $app_id = "YOUR_APP_ID";
  $app_secret = "YOUR_APP_SECRET";
  $app_domain = "YOUR_APP_DOMAIN"; // e.g. developers.facebook.com

  // First, get a valid access token for the app
  $token_url = "https://graph.facebook.com/oauth/access_token?" .
    "client_id=" . $app_id .
    "&client_secret=" . $app_secret .
    "&grant_type=client_credentials";

  $app_access_token = file_get_contents($token_url);

  // Query the Graph API for the send views
  $graph_url="https://graph.facebook.com/insights/"
    . "domain_widget_send_views?"
    . "domain=" . $app_domain . "&"
    . $app_access_token;

  $response = file_get_contents($graph_url);
    
  // Use the results
  echo "<pre>";
  echo print_r(json_decode($response));
  echo "</pre>";

?>