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<?php
namespace Yiisoft\Yii\Web\Middleware;
use Psr\Container\ContainerInterface;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Server\MiddlewareInterface;
use Psr\Http\Server\RequestHandlerInterface;
use Yiisoft\Injector\Injector;
/**
* Callback wraps arbitrary PHP callback into object matching [[MiddlewareInterface]].
* Usage example:
*
* ```php
* $middleware = new CallbackMiddleware(function(ServerRequestInterface $request, RequestHandlerInterface $handler) {
* if ($request->getParams() === []) {
* return new Response();
* }
* return $handler->handle($request);
* });
* $response = $middleware->process(Yii::$app->getRequest(), $handler);
* ```
* @see MiddlewareInterface
*/
class Callback implements MiddlewareInterface
{
* @var callable a PHP callback matching signature of [[MiddlewareInterface::process()]].
private $callback;
private $container;
public function __construct(callable $callback, ContainerInterface $container)
$this->callback = $callback;
$this->container = $container;
}
public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
return (new Injector($this->container))->invoke($this->callback, [$request, $handler]);
yiisoft /
yii-web
