Getting started with PBX

First, let's set up our basic application.

As I previously mentioned, we're building this application using the Jolt micro framework, which is a mini MVC framework that I developed and used for many applications.

I'm going to go over a basic introduction to it so that you can see how it all works and then as we go through each recipe, we'll build on our application until we get a nice, handy system.

You can download the Jolt framework from http://joltframework.com/.

Jolt works in an interesting way; we set it up so that the get and post portions of the site are separated as shown in the following code snippet:

<?php
include 'jolt.php';
$app = new Jolt('my app'),
$app->get('/greet', function () use ($app){
    // render a view
    $app->render( 'page', array(
        "pageTitle"=>"Greetings",
        "body"=>"Greetings world!"
    ));
});
$app->post('/greet', function () use ($app){
    // render a view
    $app->render( 'page', array(
        "pageTitle"=>"Greetings",
        "body"=>"Greetings world!"
    ));
});
$app->get('/', function()  use ($app) {
    $app->render('home'),
});
$app->listen();
?>

This will build a basic application that has an index and a greeting page. However, the greetings page shows both the get() and post() methods, which means that a loading/greeting with get (meaning, not called from a form) will result in one page, and a loading/greeting as a form submission will get you something entirely different. You can also add route(), if you don't care about get() or post(), or add put() and delete().

Another useful feature of Jolt is the session store; if we called the $app->store("name","test"); method, we can call $name = $app->store('name'), at any point in time and return the variable we assigned. This is useful for storing data that needs to be retrieved across the site, such as a logged-in user.

One thing you will notice is that instead of having multiple PHP files for each page, we created a new route.

Getting ready

The complete source code for this recipe can be found in the Chapter9/Recipe1 folder in the source code for this book.

How to do it...

This recipe will download the necessary pieces and set it up for our PBX.

We're going to set up the application using the following steps:

  1. Download the Jolt framework from http://joltframework.com/.
  2. Create a folder called system.
  3. Upload jolt.php, functions.php, and pdo.class.php to the system folder.
  4. Upload the .htaccess file to your website.
    RewriteEngine On
# RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^ index.php [QSA,L]

    Note

    Jolt does require mod_rewrite, which is a standard on most server setups.

  5. Create a folder called views.
  6. Upload a file in views called layout.php with the following content:
    <html>
<head>
  <title><?=$pageTitle?></title>
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <link href="//netdna.bootstrapcdn.com/twitter-bootstrap/2.3.0/css/bootstrap-combined.no-icons.min.css" rel="stylesheet">
  <link href="//netdna.bootstrapcdn.com/font-awesome/3.0.2/css/font-awesome.css" rel="stylesheet">
  <link href="//netdna.bootstrapcdn.com/font-awesome/3.0.2/css/font-awesome-ie7.css" rel="stylesheet">
    <link href="//netdna.bootstrapcdn.com/twitter-bootstrap/2.3.0/css/bootstrap-responsive.min.css" rel="stylesheet">
  <script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
  <script src="//netdna.bootstrapcdn.com/twitter-bootstrap/2.3.0/js/bootstrap.min.js"></script>
</head>
<body>
  <div class="container">
    <div class="masthead">
      <h3 class="muted">My PBX</h3>
      <div class="navbar">
        <div class="navbar-inner">
          <div class="container">
            <ul class="nav">
              <li class="active"><a href="<?=$uri?>/">Home</a></li>
              <li><a href="<?=$uri?>/login">Login</a></li>
              <li><a href="<?=$uri?>/signup">Signup</a></li>
            </ul>
          </div>
        </div>
      </div><!-- /.navbar -->
    </div>
    <?=$pageContent?>
    <hr />
    <div class="footer">
      <p>&copy; MY PBX <?=date("Y")?></p>
    </div>
  </div> <!-- /container -->
</body>
</html>
  7. Download the Twilio Helper Library from https://github.com/twilio/twilio-php/zipball/master and unzip the file.
  8. Upload the Services/ folder to your website.
  9. Add sql.sql to your database.
  10. Upload config.ini to the site that contains the following content:
    ;site settings
site.name = my site
site.url = 

; rendering vars
views.root = views
views.layout = layout

; session vars
cookies.secret = IeNj0yt0sQu33zeflUFfym0nk1e
cookies.flash = _F

;  twilio vars
twilio.accountsid = 
twilio.authtoken = 
twilio.fromNumber = 
;  database vars
mysql.dbhost = 
mysql.dbname = 
mysql.dbuser = 
mysql.dbpass =

    Note

    You may notice this file is laid out slightly differently than your previous config.php files because of the way this framework works. Instead of separate variables, we store them in an .ini file that is read by the Jolt system store. Then, instead of calling $dbhost, we will call $app->option('mysql.dbhost').

  11. Upload index.php (containing the following content) to your site as follows:
    <?php
include 'Services/Twilio.php';
require("config.php");
require("system/jolt.php");
require("system/pdo.class.php");
require("system/functions.php");

$_GET['route'] = isset($_GET['route']) ? '/'.$_GET['route'] : '/';
$app = new Jolt('site',false);
$app->option('source', 'config.ini'),
$mysiteURL = $app->option('site.url'),

$app->get('/', function() use ($app){
  $app->render( 'home' );
});
$app->listen();
  12. Upload the following home.php file to your views folder:
    <div class="jumbotron">
  <h1>My PBX</h1>
  <p class="lead">
    This is a basic PBX system built for the Twilio Cookbook
  </p>
</div>

How it works...

In steps 1, 2, 3, 4, and 5, we downloaded and installed the Jolt framework for PHP. We also set up a system and views folder.

In step 6, we created layout.php, which is our layout for the site.

In steps 7 and 8, we downloaded and installed the Twilio Helper Library for PHP. This library is the heart of your Twilio-powered apps.

In step 9, we loaded our database schema into our database.

In step 10, we set up our config.ini file.

In step 11, we set up our barebones index.php file, which doesn't do much right now.

Finally, in step 12, we set up home.php, which is the first page people will see when they load the site in their browser.

When you load the app now, you'll go to the index file, which is specified by $app->get("/") route.

All this page does is load the home.php file found in the views folder.

We've set up the basic framework for our PBX system. Now let's make it actually do something.

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