Zend Expressive in 15 Minutes

NomadPHP, March 2016 1

Zend Expressive in 15 MinutesChris Tankersley@dragonmantankNomadPHP, March 2016

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Who Am I• PHP Programmer for over 11 years• Sysadmin/DevOps for around 9 years• https://github.com/dragonmantank

• Author of “Docker for Developers”• Reigning, Defending, Undisputed PHP

MTG Champion of the World

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What is it?

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It’s the Future! And Now!• A Microframework• Implements PSR-7• Fully functional Middleware stack• The beginnings of Zend Framework 3

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The Microframework

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The Microframework• Lightweight wrapper around other libraries• PSR-7 Compliant• Supports multiple routers• Supports multiple service locators• Supports multiple templating systems

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<?phpuse Zend\Expressive\AppFactory;

chdir(dirname(__DIR__));require 'vendor/autoload.php';

$app = AppFactory::create();

$app->get('/', function ($request, $response, $next) { $response->getBody()->write('Hello, world!'); return $response;});

$app->pipeRoutingMiddleware();$app->pipeDispatchMiddleware();$app->run();

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Not just for basic sites• Provides support for Controllers, Dependency Injection, and

Templating• Right now feels somewhere between a microframework and full stack

like ZF2 or symfony2

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use Psr\Http\Message\ResponseInterface;use Psr\Http\Message\ServerRequestInterface;

/** * Renders out the homepage * * @param ServerRequestInterface $request * @param ResponseInterface $response * @param callable|null $next * * @return HtmlResponse */public function __invoke( ServerRequestInterface $request, ResponseInterface $response, callable $next = null){ return new HtmlResponse($this->template->render('index::homepage'));}

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PSR-7 Implementation

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What is PSR-7?• HTTP Message Interfaces• Provides a consistent interface for HTTP requests and responses• Allows multiple libraries to read and generate HTTP messages more

easily

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<?phpuse Zend\Expressive\AppFactory;

chdir(dirname(__DIR__));require 'vendor/autoload.php';

$app = AppFactory::create();

$app->get('/', function ($request, $response, $next) { $response->getBody()->write('Hello, world!'); return $response;});

$app->pipeRoutingMiddleware();$app->pipeDispatchMiddleware();$app->run();

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use Psr\Http\Message\ResponseInterface;use Psr\Http\Message\ServerRequestInterface;

/** * Renders out the homepage * * @param ServerRequestInterface $request * @param ResponseInterface $response * @param callable|null $next * * @return HtmlResponse */public function __invoke( ServerRequestInterface $request, ResponseInterface $response, callable $next = null){ return new HtmlResponse($this->template->render('index::homepage'));}

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Middleware

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Built around Middleware• Middleware interacts with the Request and Response• Can be used for things like authentication, authorization, session

handling… anything “application”-y• Almost everything is middleware, even routes

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class SessionMiddleware{ protected $sessionContainer;

// ...

public function __invoke( ServerRequestInterface $request, ResponseInterface $response, callable $next = null) { $request = $request ->withAttribute('session', $this->sessionContainer->getSession());

if ($next) { return $next($request, $response); }

return $response; }}

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class SessionMiddleware{ protected $sessionContainer;

// ...

public function __invoke( ServerRequestInterface $request, ResponseInterface $response, callable $next = null) { $request = $request ->withAttribute('session', $this->sessionContainer->getSession());

if ($next) { return $next($request, $response); }

return $response; }}

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class SessionMiddleware{ protected $sessionContainer;

// ...

public function __invoke( ServerRequestInterface $request, ResponseInterface $response, callable $next = null) { $request = $request ->withAttribute('session', $this->sessionContainer->getSession());

if ($next) { return $next($request, $response); }

return $response; }}

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use Psr\Http\Message\ResponseInterface;use Psr\Http\Message\ServerRequestInterface;

/** * Renders out the homepage * * @param ServerRequestInterface $request * @param ResponseInterface $response * @param callable|null $next * * @return HtmlResponse */public function __invoke( ServerRequestInterface $request, ResponseInterface $response, callable $next = null){ return new HtmlResponse($this->template->render('index::homepage'));}

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Getting Started

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Resources• Documentation - https://zend-expressive.readthedocs.org/en/latest/• Skeleton App - https://github.com/zendframework/zend-expressive-

skeleton

• My Demo App - https://github.com/dragonmantank/phparch-zend-expressive• Session Middleware - https://github.com/dragonmantank/

zendexpressive-session-middleware

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http://ctankersley.comchris@ctankersley.com

@dragonmantank

https://joind.in/talk/d9813