dash-send-tweet-endpoint.php

<?php

error_reporting(E_ALL);
ini_set('display_errors', 1);

$ua = $_SERVER['HTTP_USER_AGENT'];

//User agent must be set to "**MY-SECRET-USER-AGENT**" and the ?secret must be "key"
if("**MY-SECRET-USER-AGENT**" == $ua && isset($_GET['secret']) && "key" == $_GET['secret']){

	// Load Composer
	require_once('../vendor/autoload.php');
	
	//if the type is set to "twitter" and the msg is not empty
	if(isset($_GET['type']) && "twitter" == $_GET['type'] && isset($_GET['msg']) && !empty($_GET['msg'])){

		//prepend a timestamp to the message
		$message = '['.date('Y-m-d H:i:s').'] '.urldecode($_GET['msg']);
		
		// Using dg's twitter library - https://github.com/dg/twitter-php
		$twitter = new Twitter(
		'ConsumerKey', 
		'ConsumerSecret', 
		'AccessToken', 
		'AccessTokenSecret'
		);
		
		//post it to Twitter
		$twitter->send($message);
		
	}

}