Laravel自定义异常

Question

Before posting this question I have searched internet for appropriate answers but got none.These are my following questions:

1) How to throw exception without try catch in laravel controller and get exception in the view of the called controller. Example : TestController.php

function index(){
throw new CustomException('Data not found');
return view('dashboard');
}

How to get exception message in dashboard view

2) How to set format for exception message, suppose I want to return format as

$response['code'] = 0;
        $response['status'] = 'error';
        $response['message'] = 'message';
        $response['data'] = '';

I have created a custom exception but don't know how to use it to fully

<?php

namespace App\Exceptions;

use Illuminate\Http\Request;
use Illuminate\Http\Response;
use Mockery\Exception;

class CustomException extends Exception{

    public $response;


    /**
     * Report the exception.
     *
     * @return void
     */
    public function report()
    {
    }

    /**
     * Render the exception into an HTTP response.
     *
     * @param  \Illuminate\Http\Request
     * @return \Illuminate\Http\Response
     */
    public function render($request,$exception){
        ob_clean();
        $response['code'] = 0;
        $response['status'] = 'error';
        $response['message'] = 'Message';
        $response['data'] = '';
        if(!$request->ajax()){
            // non ajax response
        }else{
            return response()->json($response);
        }
    }

}

Answer 1

All uncaught exceptions are intercepted by default exceptions handler. If you want this to behave differently, you just need to modify it: https://laravel.com/docs/5.7/errors#the-exception-handler