This is a simple PHP script that will let you automatically check into Foursquare venues based on your GeoFency bounds.

geofency-foursquare.php

<?php
  $accesstoken = "oAuth Access Token from Foursquare";
  $loc = $_REQUEST['id'];
  // Just add a switch case for every venue you want to check into
  // Use something like requestb.in to find the location id
  // Paste it into the case, and then paste the Foursquare/Swarm venue ID
  switch($loc) {
    case '2FB4E2F2-34E7-4B73-A553-9BCC1C1204CF':
      // Home
      $venueid = "4c4a689542b4d13a23ba297d";
      break;
    case '35333250-106C-48D2-BF31-D49EE9BEBB39':
      // Work
      $venueid = "507478bee4b05243aa30afe8";
      break;
    default:
      http_response_code(400);
      exit($loc.' is not a valid location id!');
      break;
  }

  $post_data['venueId'] = $venueid;
  $post_data['ll'] = $_REQUEST['latitude'].','.$_REQUEST['longitude'];
  if($_REQUEST['debug']) {
    $post_data['broadcast'] = "private";
  }

  foreach ( $post_data as $key => $value) {
    $post_items[] = $key . '=' . $value;
  }

  $post_string = implode('&', $post_items);
  if($_REQUEST['debug']) {
    echo $post_string;
  }

  $curl_connection = curl_init('https://api.foursquare.com/v2/checkins/add?oauth_token='.$accesstoken.'&v=20140806');

  curl_setopt($curl_connection, CURLOPT_CONNECTTIMEOUT, 30);
  curl_setopt($curl_connection, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($curl_connection, CURLOPT_SSL_VERIFYPEER, false);
  curl_setopt($curl_connection, CURLOPT_FOLLOWLOCATION, 1);

  curl_setopt($curl_connection, CURLOPT_POSTFIELDS, $post_string);

  $result = curl_exec($curl_connection);
  $json = json_decode($result, true);
  if($_REQUEST['debug']) {
    echo "<pre>";
    print_r($json);
    echo "</pre>";
  }

  if($json['meta']['code'] == 200) {
    http_response_code(200);
    echo "OK";
  } else {
    print_r(curl_getinfo($curl_connection));
    echo curl_errno($curl_connection).'-'.curl_error($curl_connection);
    http_response_code(500);
    exit('Something went wrong!');
  }
  curl_close($curl_connection);

?>

Ha@633475