Using Serverless Framework with OpenWhisk PHP

Serverless Framework is a toolkit to help you mange and deploy a serverless application. (Personally, I'm not a fan of the name as the word "Serverless" already has a meaning in the same space!) It's a useful tool and supports all the major providers, though AWS Lambda seems to be first-among-equals. The OpenWhisk plugin for Serverless is maintained by the rather excellent James Thomas, so if you have any questions, ping him! As I build… continue reading.

Posted on 31 May 2018 in OpenWhisk, PHP, Serverless Framework

Automated Testing for PHP training course

I'm delighted to announce my new venture, PHP Training, with my friend Gary Hockin. As you can probably guess from the name, PHP Training is a training organisation where we provide public training courses on topics related to PHP. These courses will be held in person, initially at various venues in the UK, and are taught by Gary and myself. Both of us are experienced trainers and this is the first time we've offered training… continue reading.

Posted on 17 January 2018 in PHP, PHP Training

Using Composer packages with OpenWhisk

When creating new OpenWhisk actions in PHP, It's likely that you'll want to take advantage of the rich ecosystem of Composer packages on Packagist.org. The OpenWhisk PHP runtime has you covered with some pre-installed Composer packages and also the ability to upload your own using a zip file. Pre-installed Composer packages The PHP runtime ships with two Composer packages by default: Guzzle and ramsey/uuid. This is handy as if you need to make an API… continue reading.

Posted on 3 January 2018 in OpenWhisk, PHP

Implementing CORS in Zend Expressive

On a recent project, I needed to implement CORS support for my Expressive API. The easiest way to do this is to use Mike Tuupola's PSR-7 CORS Middleware. As this is a standard Slim-Style PSR-7 middleware implementation, we need to wrap it for Expressive, so we make a factory: App/Factory/CorsMiddlewareFactory.php: <?php declare(strict_types=1); namespace App\Factory; use Tuupola\Middleware\Cors; use Zend\Diactoros\Response; use Zend\Stratigility\Middleware\CallableMiddlewareWrapper; class CorsMiddlewareFactory { public function __invoke($container) { return new CallableMiddlewareWrapper( new Cors([ "origin" => ["*"],… continue reading.

Posted on 15 November 2017 in PHP, Zend Expressive

Customising Whoops in Expressive

I find the Whoops error handler page in Expressive quite hard to read and particularly dislike that the error message displayed in the top left is hidden if it's more than a few words long. To fix this, I discovered that you can provide a custom CSS file to the PrettyPrintHandler and then override to your heart's content! One way to do this is to add a delegator factory to add the additional functionality, so… continue reading.

Posted on 8 November 2017 in PHP, Zend Expressive

OuputBuffer Middleware for Expressive

When developing an Expressive application, if you use var_dump(), echo, print_r(), etc when you get this error: Fatal error: Uncaught RuntimeException: Output has been emitted previously; cannot emit response in /www/dev/rka/example-app/vendor/zendframework/zend-diactoros/src/Response/SapiEmitterTrait.php:31 This occurs after your data has been displayed and makes perfect sense as Expressive is unable to send headers as you've already started sending the body. To solve this, you need some middleware. It looks like this: <?php namespace Akrabat\Middleware; use const Webimpress\HttpMiddlewareCompatibility\HANDLER_METHOD; use… continue reading.

Posted on 25 October 2017 in PHP, Zend Expressive

Displaying errors in Expressive with Twig

If you're not using the Whoops error handler with Expressive and are using the Twig renderer, then you are given no information about the problem that occurred, even in debug mode. To fix this, I changed error.html.twig to this: {% extends '@layout/default.html.twig' %} {% block title %}{{ status }} {{ reason }}{% endblock %} {% block content %} <h1>Oops!</h1> <h2>This is awkward.</h2> <p>We encountered a {{ status }} {{ reason }} error.</p> {% if status… continue reading.

Posted on 18 October 2017 in PHP, Zend Expressive, Zend Framework

Pretty print curl -i

My favourite tool for working with APIs is curl, though I recognise that lots of people like HTTPie and seem very keen to tell about it every time I mention curl… With curl, I particularly like using the -i switch to view the status line and headers too without the additional cruft of -v: This generates an output that looks like this: $ curl -i https://api.joind.in HTTP/1.1 200 OK Date: Wed, 04 Oct 2017 09:51:46… continue reading.

Posted on 11 October 2017 in Computing, PHP

Converting a Composer dependency to git for editing

I'm adding a new feature to ZF's Problem-Details component and it's easiest to do this within the context of the application I'm developing. The component lives in vendor/zendframework/zend-problem-details and was installed using composer require so doesn't have its own git repository as the distribution zip file was used to install it. To change it to a git repository, we can use the –prefer-source option and specify a branch like this: $ composer require –prefer-source zendframework/zend-problem-details:dev-master… continue reading.

Posted on 4 October 2017 in PHP

CORS and OpenWhisk web actions

By default, OpenWhisk will handle the relevant responses for CORS. Specifically, it will respond to an OPTIONS request with these headers: Access-Control-Allow-Origin: * Access-Control-Allow-Methods: OPTIONS, GET, DELETE, POST, PUT, HEAD, PATCH Access-Control-Allow-Headers: Authorization, Content-Type If you need to change what is sent or you don't want to send these headers at all, then you need to do set the annotation web-custom-options to true and handle the OPTIONS header yourself. Note that if you don't set… continue reading.

Posted on 20 September 2017 in OpenWhisk, PHP, Swift

Category: PHP