php - Error Handling in Slim Framework Custom Middleware -

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i trying handle errors in slim framework custom middle ware dont know how in code doing if request not of 4 specific types through error want handel in errorhandler appropriate message , status code returning status in postman blank screen in response body. not familiar slim. in advance

<?php   require 'vendor/autoload.php';  use \slim\app;  $c = new \slim\container();  $c['notallowedhandler'] = function ($c) {      return function ($request, $response, $methods) use ($c) {         return $c['response']             ->withstatus(405)             ->withheader('allow', implode(', ', $methods))             ->withheader('content-type', 'application/json')         ->write(json_encode(array("c_status"=>"405","message"=>"bad request")));     }; };  $c['notfoundhandler'] = function ($c) {     return function ($request, $response) use ($c) {         return $c['response']             ->withstatus(404)             ->withheader('content-type', 'application/json')         ->write(json_encode(array("c_status"=>"404","message"=>"not found")));     }; };   $c['errorhandler'] = function ($c) {     return function ($request, $response, $exception) use ($c) {         $data = [             'c_status' => $response->getstatus(),             'message' => $exception->getmessage()         ];         return $container->get('response')->withstatus($response->getstatus())             ->withheader('content-type', 'application/json')             ->write(json_encode($data));     }; };  $app = new app($c);  $app->add(function ($request, $response, $next) {     if($request->isget() || $request->ispost() || $request->isput() || $request->isdelete()){         $response = $next($request, $response);     }else{         $response = $response->withstatus(403);     }     return $response; });  require 'api/routes.php'; $app->run();

throw exception:

$app->add(function ($request, $response, $next) {     if($request->isget() || $request->ispost() || $request->isput() || $request->isdelete()){         $response = $next($request, $response);     }else{         throw new \exception("forbidden", 403);     }     return $response; })

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