DTO Transformer for php

BaseDto.php

<?php

namespace App\DTO;

use App\Interfaces\ActionServiceDTOInterface;
use Illuminate\Support\Str;

class BaseDto
{
    public function __construct(?array $data = null)
    {
        if ($data) {
            foreach ($data as $key => $value) {

                $value = $this->castingValue($key, $value);

                $this->{Str::camel($key)} = $value;
            }
        }
    }

    public function toArray()
    {
        return array_reduce(array_keys(get_object_vars($this)), function ($carry, $key) {

            if (
                (is_object($this->{$key}) || is_string($this->{$key}))
                && method_exists($this->{$key}, 'toArray')
            ) {
                $carry[Str::snake($key)] = $this->{$key}->toArray();
            } else {
                $carry[Str::snake($key)] = $this->{$key};
            }

            return $carry;
        }, []);
    }

    /**
     * @param string $key
     * @param mixed $value
     * @return array|bool|float|int|mixed|object|string
     */
    public function castingValue(string $key, mixed $value): mixed
    {
        $type = gettype($this->{Str::camel($key)});

        if ($type == 'integer') {
            $value = str_replace(',','',$value); // replace all unwanted value
            $value = (int)$value;
        } elseif ($type == 'string') {
            $value = (string)$value;
        } elseif ($type == 'array') {
            $value = (array)$value;
        } elseif ($type == 'double') {
            $value = str_replace(',','',$value); // replace all unwanted value
            $value = (float)$value;
        } elseif ($type == 'boolean') {
            $value = str_replace(',','',$value); // replace all unwanted value
            $value = (bool)$value;
        }

        return $value;
    }

}