Snippet from hello-bootstrap.php

hello-bootstrap.php

<?php
/**
 * The main plugin function. Checks php version
 * and initialize our classes
 */
function helloTestableBootstrap()
{
    $pluginVersion = '0.1.0';
    if (defined('DOING_AJAX') && DOING_AJAX) {
        return;
    }

    if (version_compare(PHP_VERSION, '5.3.9', '>=')) {
        require_once __DIR__ . '/vendor/autoload.php';
        require_once __DIR__ . '/src/RuntimeProvider.php';

        if (!defined('HELLO_TESTABLE_VERSION')) {
            define('HELLO_TESTABLE_VERSION', $pluginVersion);
        }

        $app = new helloTestable\Pimple\Container();
        $app->register(new helloTestable\RuntimeProvider());
        $helloTestable = $app['helloTestable'];

        add_action('init', array($helloTestable, 'init'));

    } else {
        register_activation_hook(__FILE__, 'hello_testable_php_version_too_low');
    }
}