Sending bulk SMS to a list of contacts

When you have a big product launch and you want to notify your users or send out a promotion, this is the script you would use.

Getting ready

The complete source code for this recipe can be found in the Chapter6/Recipe4/ folder.

How to do it...

We're going to build an app in this section that will let us send a message to a list of contacts. This is handy for advertising new promotions with your business.

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. Upload bulk.php to your server and add the following code to it:

   <?php
   include('Services/Twilio.php');
   include("config.php");
   include("functions.php");
   $client ...