Data Transfer Object (DTO) in Laravel with PHP7.4 typed properties. Source: https://dev.to/zubairmohsin33/data-transfer-object-dto-in-laravel-with-php7-4-typed-properties-2hi9

CheckoutData.php

<?php

class CheckoutData extends DataTransferObject
{
   public int $checkout_id;

   public Carbon $completed_at;

   public static function fromRequest(Request $request){ ... }

   public static function fromWebhook(array $params)
   {
      return new self([
        'checkout_id' => $params['id'],
        'completed_at' => $params['completed_at']
      ]);
   }
}

DataTransferObject.php

<?php

abstract class DataTransferObject
{
    public function __construct(array $parameters = [])
    {
        $class = new ReflectionClass(static::class);

        foreach ($class->getProperties(ReflectionProperty::IS_PUBLIC) as $reflectionProperty){
            $property = $reflectionProperty->getName();
            $this->{$property} = $parameters[$property];
        }
    }
}