Building an emergency calling system

I'm a type-2, insulin-dependent diabetic. I also drive two hours every day—to my office and back. So, after I spent a week in the hospital last year, I decided to set up an In Case Of Emergency (ICE) system so that I could call one number and have it try multiple numbers at once.

Getting ready

The complete source code for this recipe can be found in the Chapter2/Recipe4 folder.

How to do it...

This emergency calling system will try a group of numbers at the same time; the first number to answer will get connected.

1. Download the Twilio Helper Library from https://github.com/twilio/twilio-php/zipball/master and unzip it.

2. Upload the Services/ folder to your website.

3. Upload config.php to your website and make sure the following variables are set:

   <?php
     $accountsid = '';  //  YOUR TWILIO ACCOUNT SID
     $authtoken = '';  //	  YOUR TWILIO AUTH TOKEN
     $fromNumber = '';  //  PHONE NUMBER CALLS WILL COME FROM
   ?>

4. Create a file on your website called ice.php, with...