Do some work Before and After the Slim route is executed. Demonstrates the use of Middleware in Slim instead of Hooks.

slim_demo.php

<?php

/*#############################
* Developer: Mohammad Sharaf Ali
* Designation: Web Developer
* Version: 1.0
*/#############################

use \Psr\Http\Message\ServerRequestInterface as Request;
use \Psr\Http\Message\ResponseInterface as Response;
use \Slim\App as Slim;

require 'vendor/autoload.php';

$config['determineRouteBeforeAppMiddleware'] = true;

$app = new Slim(['settings' => $config]);

$mw = (function (Request $request, Response $response, callable $next) {
 	// do some work before route invoked
 	$response = $response->withStatus(200)->write(' before ');
 	
 	$response = $next($request, $response);

 	// do some work after route executed
 	$response = $response->withStatus(200)->write(' after ');
 	
 	// finally serve data to client
 	$body = $response->getBody()->__toString();
 	$response = $response->withJson(array('data' => $body));
 	return $response;
});

$mw1 = (function (Request $request, Response $response, callable $next) {
 	$response = $next($request, $response);
 	$response = $response->withStatus(200)->write(' seq1 ');
 	return $response;
});

$mw2 = (function (Request $request, Response $response, callable $next) {
    $name = $request->getAttribute('route')->getArgument('name');
	$response = $next($request, $response);
	$response->withStatus(200)->write(' seq2 with name ' . $name);
	return $response;

});

$app->add($mw);

$app->get('/hello/{name}', function (Request $request, Response $response) {
    $name = $request->getAttribute('name');
    $response->getBody()->write(" Hello, $name ");
    return $response;
})->add($mw1)->add($mw2);

$app->run();