Slim 3 Middleware Execution Order Example (last in, first executed)

life.md

<?php

require 'vendor/autoload.php';

$app = new \Slim\App();

// Executed last as it's first in (FILE)
$app->add(function ($request, $response, $next) {
	// Execute the routes first
	$response = $next($request, $response);
	// Append the result from routes
	$response->getBody()->write(' Baz ');

	return $response;
});

$app->get('/', function ($req, $res, $args) {
	echo ' Bar ';
});

// Executed first as it's last in (LIFE)
$app->add(function ($request, $response, $next) {
	$response->getBody()->write(' Foo ');

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

$app->run();

Thanks, was very useful explanation!