[Phalcon + AWS SDK PHP] Autoload AWS and add to Dependency Injector example

app.php

<?php


/*

This example shows how to:

- Autoload AWS SDK PHP
- Add AWS SDK PHP to the Dependency Injector
- Retrieve AWS dependency from DI and make a call.

Note: I used composer to install my dependencies, but that is it, autoloading is handled by Phalcon 

composer.json: 

{
    "require": {
        "aws/aws-sdk-php": "dev-master"
    }
}

don't forget to: composer install --prefer-dist

Trouble Shooting:

If you see a PHP error like this... you forgot to configure your AWS keys

PHP Fatal error:
    Uncaught Aws\S3\Exception\InvalidArgumentException:
        AWS Error Code: InvalidArgument,
        Status Code: 400,
        AWS Request ID: #AWS_REQUEST_ID#,
        AWS Error Type: client,
        AWS Error Message: Authorization header is invalid -- one and only one ' ' (space) required,
        User-Agent: aws-sdk-php2/2.6.7 Guzzle/3.9.1 curl/7.28.1 PHP/5.5.10

Otherwise, feel free to ask questions

*/



// This one goes to 11
error_reporting(E_ALL);

try {

// Create Configuration Object

$config = new Phalcon\Config(array(
    'application' => array(
        'vendorDir' => __DIR__ . '/vendor/'
    ),
    // You really should store your aws key/secret values elsewhere
    'aws' => array(
        'key' => '*** YOUR AWS KEY GOES HERE ***',
        'secret' => '** YOUR AWS SECRET GOES HERE ***',
        'region' => 'us-east-1' // Change to your region
    )
));


// Create AutoLoader
$loader = new Phalcon\Loader();

// Register Namespaces with Phalcon\Loader
$loader->registerNamespaces(
    array(
        'Aws' => $config->application->vendorDir . 'aws/aws-sdk-php/src/Aws/',
        'Guzzle' => $config->application->vendorDir . 'guzzle/guzzle/src/Guzzle',
        'Symfony\Component\EventDispatcher' => $config->application->vendorDir . 'symfony/event-dispatcher/Symfony/Component/EventDispatcher'
    )
);

$loader->register();

//Create the Dependency Injector Container
$di = new Phalcon\DI\FactoryDefault();

$di['aws'] = function () use ($config) {
    $aws = Aws\Common\Aws::factory(array(
        'key' => $config->aws->key,
        'secret' => $config->aws->secret,
        'region' => $config->aws->region
    ));
    return $aws;
};

// Create Phalcon App
$app = new \Phalcon\Mvc\Micro();

// Assign Dependency Injector
$app->setDi($di);

// Add Routes
$app->get('/', function () use ($app, $config) {

    // Get AWS Dependency from Dependency Injector and instantiate S3Client
    $s3 = $app->getDI()->get('aws')->get('s3');

    // Request a list of all buckets from AWS
    $result = $s3->listBuckets();

    // interate and print each bucket's name on a separate line
    foreach ($result['Buckets'] as $bucket) echo "{$bucket['Name']}<br/>\n";

});

// Yo handle yo' business fool
$app->handle();


} catch (Phalcon\Exception $e) {
    echo $e->getMessage();
} catch (PDOException $e) {
    echo $e->getMessage();
}

What's the use of Symfony EventDispatcher?