How to create custom error handlers in Symfony?

To create custom error handlers in Symfony, follow these steps:

Create a new class that extends Symfony\Component\Debug\ExceptionHandler and implement the handle() method:

namespace App\Handler;

use Symfony\Component\Debug\ExceptionHandler as BaseExceptionHandler;

class CustomExceptionHandler extends BaseExceptionHandler
{
    public function handle(\Exception $exception)
    {
        // Handle the exception here
    }
}

services:
    App\Handler\CustomExceptionHandler:
        tags:
            - { name: kernel.exception }

Update your config/packages/framework.yaml file to use the custom error handler service:

framework:
    exception_handler: App\Handler\CustomExceptionHandler

Implement the logic in the handle() method of the CustomExceptionHandler to handle the Exception object. You can log the error, render a custom error page, or perform any other desired action.

With these steps, you have created a custom error handler in Symfony that will be used to handle exceptions thrown in your application.