A custom package/module exception handler that decorates the Laravel's app exception handler. And also a nice introduction to the Decorator and Chain of Responsibility design patterns.

Handler.php

<?php

namespace Package\Exceptions;

use Exception;
use Illuminate\Contracts\Debug\ExceptionHandler as HandlerContract;

class Handler implements HandlerContract
{
    /**
     * The exception handler being decorated.
     *
     * @var \Illuminate\Contracts\Debug\ExceptionHandler
     */
    protected $exceptionHandler;

    /**
     * Create a new exception handler instance.
     *
     * @param  \Illuminate\Contracts\Debug\ExceptionHandler  $exceptionHandler
     * @return void
     */
    public function __construct(HandlerContract $exceptionHandler)
    {
        $this->exceptionHandler = $exceptionHandler;
    }

    /**
     * Report or log an exception.
     *
     * @param  \Exception  $exception
     * @return void
     *
     * @throws \Exception
     */
    public function report(Exception $exception)
    {
        // Handle whatever you want...

        // Fallback to app handler
        $this->exceptionHandler->report($exception);
    }

    /**
     * Render an exception into a response.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Exception  $exception
     * @return \Symfony\Component\HttpFoundation\Response
     */
    public function render($request, Exception $exception)
    {
        // Handle whatever you want...

        // Fallback to app handler
        return $this->exceptionHandler->render($request, $exception);
    }

    /**
     * Render an exception to the console.
     *
     * @param  \Symfony\Component\Console\Output\OutputInterface  $output
     * @param  \Exception  $exception
     * @return void
     */
    public function renderForConsole($output, Exception $exception)
    {
        // Handle whatever you want...

        // Fallback to app handler
        $this->exceptionHandler->renderForConsole($output, $exception);
    }
}

ServiceProvider.php

<?php

namespace Package;

use Illuminate\Contracts\Debug\ExceptionHandler as HandlerContract;
use Illuminate\Support\ServiceProvider as AbstractServiceProvider;
use Package\Exceptions\Handler;

class ServiceProvider extends AbstractServiceProvider
{
    /**
     * Bootstrap the package services.
     *
     * @return void
     */
    public function boot()
    {
        //
    }

    /**
     * Register the package services.
     *
     * @return void
     */
    public function register()
    {
        $this->app->extend(HandlerContract::class, function ($appHandler) {
            return new Handler($appHandler);
        });
    }
}