A webhook for safety alert emails, built to work with the Illinois Institute of Technology's alert system. This script posts alert messages to a Facebook group as soon as the POST request is made.

iitalert.php

<?php
/**
 * IIT Alert notification app
 * Created by: Eric Tendian
 * This script is meant to be kicked off by cloudmailin.com upon a new email.
 *
 * Access token last generated: 25 August 2014
 * 
 * To generate a new token, first visit the URL:
 * https://graph.facebook.com/oauth/authorize?type=user_agent&client_id=[YOUR APP ID]&redirect_uri=[YOUR REDIRECT URL]&scope=user_groups,publish_actions
 * Then take the token from that response and go to the URL:
 * https://graph.facebook.com/oauth/access_token?client_id=[YOUR APP ID]&client_secret=[YOUR APP SECRET]&grant_type=fb_exchange_token&fb_exchange_token=EXISTING_ACCESS_TOKEN
 *
 * You will then have an access token that lasts 60 days.
 *
 * For reference:
 * app id: [YOUR APP ID]
 * app secret: [YOUR APP SECRET]
 */

if (strpos($_POST['headers']['Subject'], '[IIT Alert]')===false) die;

$access_token = ''; // 60-day token goes here

$groupid = ''; // group ID to post to
$message = "--- IIT ALERT NEWS FLASH ---
Date: ".$_POST['headers']['Date']."
Subject: ".$_POST['headers']['Subject']."

".$_POST['plain']."

--- END FLASH ---
As always, register for IIT Alert here: http://web.iit.edu/iitalert";

$graph_url = "https://graph.facebook.com/v2.1/$groupid/feed";
$postData = "message=".urlencode($message)."&access_token=".$access_token."&format=json&method=post&pretty=0&suppress_http_code=1";

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, $graph_url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);

$output = curl_exec($ch);

curl_close($ch);

echo $output;
error_log($output);
?>