Download Facebook Group Feed, Memebers, & About

fbGroupDump.php

<?php
  ini_set('date.timezone', 'Asia/Taipei');

  $access_token = isset($argv[1]) ? $argv[1] : 'abcdefghijklmnopqrstuvwxyz1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz123456';

  $group_id = 123456789012345;


  /* feed */

  $until = time();
  $since = intval(substr(array_values(array_filter(scandir(__DIR__ . '/feed/', true), function($val) { return substr($val, -5) === '.json'; }))[0], 0, -5));
  $limit = 500;

  $url = "https://graph.facebook.com/$group_id/feed?until=$until&since=$since&limit=$limit&access_token=$access_token";

  do {
    $json = file_get_contents($url);
    $data = json_decode($json, true);

    if (isset($data['paging']) === false) {
      break;
    }

    file_put_contents(__DIR__ . "/feed/$until.json", $json);    
    $url = $data['paging']['next'];
    parse_str(parse_url($url, PHP_URL_QUERY), $paras);
    $until = intval($paras['until']);
  } while (true);


  /* members */

  $json = file_get_contents("https://graph.facebook.com/$group_id/members?limit=1000000&access_token=$access_token");

  if (strlen($json) > 0) {
    file_put_contents(__DIR__ . '/members/' . date('YmdHis') . '.json', $json);
  }


  /*  about */

  $json = file_get_contents("https://graph.facebook.com/$group_id/?access_token=$access_token");

  if (strlen($json) > 0) {
    file_put_contents(__DIR__ . '/about/' . date('YmdHis') . '.json', $json);
  }
?>