Exception handling in Laravel.

Exception handling is an important aspect of any web application, as it helps to gracefully handle errors and exceptions that may occur during the execution of the application. In Laravel, exception handling is done through the use of try-catch blocks and the Exception class.

When an exception is thrown in Laravel, it is caught by the framework’s exception handler, which logs the exception and displays a user-friendly error page to the user. You can customize the appearance of this error page by modifying the view located at resources/views/errors/404.blade.php.

In addition to the default exception handling provided by Laravel, you can also create your own custom exception handling logic by creating a custom exception handler class that extends the Illuminate\Foundation\Exceptions\Handler class and overriding the render method.

Here’s an example of how you can create a custom exception handler that sends an email to the site administrator whenever an exception occurs:

<?php

namespace App\Exceptions;

use Exception;
use Illuminate\Foundation\Exceptions\Handler as ExceptionHandler;
use Illuminate\Support\Facades\Mail;

class CustomExceptionHandler extends ExceptionHandler
{
    /**
     * Render an exception into an HTTP response.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Exception  $exception
     * @return \Illuminate\Http\Response
     */
    public function render($request, Exception $exception)
    {
        // Send an email to the site administrator
        Mail::to(config('app.admin_email'))->send(new ExceptionOccurred($exception));

        return parent::render($request, $exception);
    }
}

To use the custom exception handler, register it in the app/Exceptions/Handler.php file by setting the $dontReport property to an empty array and the $dontFlash property to an empty array, and then setting the $handler property to an instance of the CustomExceptionHandler class.

<?php

namespace App\Exceptions;

use App\Exceptions\CustomExceptionHandler;

class Handler extends CustomExceptionHandler
{
    /**
     * A list of the exception types that are not reported.
     *
     * @var array
     */
    protected $dontReport = [];

    /**
     * A list of the inputs that are never flashed for validation exceptions.
     *
     * @var array
     */
    protected $dontFlash = [];

    /**
     * Create a new exception handler instance.
     *
     * @return void
     */
    public function __construct()
    {
        $this->handler = new CustomExceptionHandler();
    }
}

By using try-catch blocks and custom exception handling, you can ensure that your Laravel application handles errors and exceptions in a graceful and user-friendly way.