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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
