$method = strtoupper($request->getMethod()) * routing logic which could potentially append content to the response body * is empty as the request may fall back on a GET route handler due to FastRoute's * If the incoming request method is HEAD, we need to ensure that the response body * This is to be in compliance with RFC 2616, Section 9. $response = $this->middlewareDispatcher->handle($request) * This method traverses the application middleware stack and then returns the $responseEmitter = new ResponseEmitter() var/ www/ html/ vendor/ slim/ slim/ Slim/ App.php $request = $serverRequestCreator->createServerRequestFromGlobals() Public function addDeferred(string $middleware): self * that have been added before will be executed after the newly Return $this->middleware->process($request, $this->next) Public function handle(ServerRequestInterface $request): ResponseInterface Public function _construct(MiddlewareInterface $middleware, RequestHandlerInterface $next) $this->tip = new class ($middleware, $next) implements RequestHandlerInterface Public function addMiddleware(MiddlewareInterface $middleware): MiddlewareDispatcherInterface var/ www/ html/ vendor/ slim/ slim/ Slim/ MiddlewareDispatcher.php * MiddlewareInterface $middleware #0 Slim\App:run in /var/www/html/index.php:9 #1 Slim\App:handle in /var/www/html/vendor/slim/slim/Slim/App.php:199 #2 Slim\MiddlewareDispatcher:handle in /var/www/html/vendor/slim/slim/Slim/App.php:215 #3 in /var/www/html/vendor/slim/slim/Slim/MiddlewareDispatcher.php:81 #4 Zeuxisoo\Whoops\Slim\WhoopsMiddleware:process in /var/www/html/vendor/slim/slim/Slim/MiddlewareDispatcher.php:140 #5 in /var/www/html/vendor/zeuxisoo/slim-whoops/src/Zeuxisoo/Whoops/Slim/WhoopsMiddleware.php:40 #6 App\Middleware\Session:_invoke in /var/www/html/vendor/slim/slim/Slim/MiddlewareDispatcher.php:283 #7 session_start in /var/www/html/app/Middleware/Session.php:15 #8 Whoops\Exception\ErrorException in /var/www/html/app/Middleware/Session.php:15 Whoops\Exception\ErrorException thrown with message "session_start(): open(/var/lib/php/sessions/sess_jese4h72n4mjlfsqfkh147ut5d, O_RDWR) failed: No space left on device (28)" Session_start(): open(/var/lib/php/sessions/sess_jese4h72n4mjlfsqfkh147ut5d, O_RDWR) failed: No space left on device (28)