README

DtoPacker is a small PHP library to pack data into a strongly-typed value object structure. Use it when you want to transfer objects between services and send to front.

Write to me if you need additional features PerfilovStanislav

Install

composer require perfilov/php-dto-packer

• Example
• Aliases
• Typed arrays
• Mutators
• Validators
• Dimension

Quick Example

use DtoPacker\AbstractDto;

class PurchaseDto extends AbstractDto
{
    public int $id;
    protected \DateTimeInterface $date;
    protected ProductDto $product;
}

class ProductDto extends AbstractDto
{
    public string $name;
    public float $price;
}

$data = [
    'id'      => 100,
    'date'    => '2025-10-16',
    'product' => [
        'name'  => 'apple',
        'price' => 10.5,
    ]
];

$purchase = new PurchaseDto($data);

echo "$purchase";
dd($purchase)

Output:

{"id":100,"date":"2025-10-16T00:00:00.000+00:00","product":{"name":"apple","price":10.5}}

PurchaseDto {
    +id: 100
    #date: DateTimeImmutable @1760572800 {
        date: 2025-10-16 00:00:00.0 +00:00
    }
    #product: ProductDto {
        +name: "apple"
        +price: 10.5
    }
}

Aliases

use DtoPacker\AbstractDto;
use DtoPacker\Alias;

class UserDto extends AbstractDto
{
    #[Alias('lastname', 'family_name')]
    protected string $surname;
}

$data = [
    'lastname' => 'Mask',
];

$user = new UserDto($data);

echo $user->surname; // output: Mask

$user->family_name = 'Trump'; // output: Trump

Typed arrays

use DtoPacker\AbstractDto;
use DtoPacker\Dimension;

class ExampleDto extends AbstractDto
{
    protected array|string $strings;
    protected array|int $ints;
    protected array|float $floats;
    protected array|bool $bools;
    protected array|\DateTimeInterface $dates;
    protected array|Object $objects;
    protected array|UserDto $users;
    
    #[Dimension(2)]
    protected array|int $multiInts;
}

class UserDto extends AbstractDto
{
    public string $name;
}

$datetime = new \DateTime('2030-01-01');

$object = new \stdClass();
$object->x = 2;

$user = new UserDto(['name' => 'Trump']);

$data = [
    'strings'   => ['Mask', 'Trump'],
    'ints'      => [100, 200, 300],
    'floats'    => [10.5, 99.9],
    'bools'     => [true, false],
    'dates'     => ['2025-10-16', $datetime],
    'objects'   => [['x' => 1], $object],
    'users'     => [['name' => 'Elon'], $user],
    'multiInts' => [[100, 200], [300, 400, 500]],
];

$dto = new ExampleDto($data);
echo $dto;

Output:

{
  "strings": ["Mask", "Trump"],
  "ints": [100, 200, 300],
  "floats": [10.5, 99.9],
  "bools": [true, false],
  "dates": ["2025-10-16T00:00:00.000+00:00", "2030-01-01T00:00:00.000+00:00"],
  "objects": [
    {"x": 1},
    {"x": 2}
  ],
  "users": [
    {"name": "Elon"},
    {"name": "Trump"}
  ],
  "multiInts":[
    [100,200],
    [300,400,500]
  ]
}

Mutators

use DtoPacker\AbstractDto;
use DtoPacker\PreMutator;

class UserDto extends AbstractDto
{
    #[PreMutator('ucfirst', [CustomMutator::class, 'addPrefixMr'])]
    protected string $lastname;
}

class CustomMutator
{
    public static function addPrefixMr(string $value): string
    {
        return "Mr $value";
    }
}

$user = new UserDto([
    'lastname' => 'elon'
]);

echo $user->lastname; // output: "Mr Elon"

Validators

FieldValidators - example

FieldValidators - validate field's value

use DtoPacker\AbstractDto;
use DtoPacker\Validators\Array;
use DtoPacker\Validators\Bool;
use DtoPacker\Validators\Datetime;
use DtoPacker\Validators\FieldValidators;
use DtoPacker\Validators\Numeric;
use DtoPacker\Validators\String;
use DtoPacker\Validators\Mixed;

class ExampleDto extends AbstractDto
{
    #[FieldValidators(
        new Numeric\Min(10),
        new Numeric\Max(20),
        new Numeric\Between(1, 100),
    )]
    protected int $int;

    #[FieldValidators(
        new String\Alpha(),
        new String\Card(),
        new String\Cuid(),
        new String\Email(),
        new String\Email(),
        new String\Ip(),
        new String\IpV4(),
        new String\IpV6(),
        new String\Json(),
        new String\LengthMin(10),
        new String\LengthMax(20),
        new String\LengthBetween(1, 100),
        new String\MacAddress(),
        new String\NanoId(),
        new String\Regex('/^\d$/'),
        new String\Ulid(),
        new String\Url(),
        new String\Uuid\Uuid(),
    )]
    protected string $string;

    #[FieldValidators(
        new Bool\IsFalse(),
        new Bool\IsTrue(),
    )]
    protected bool $bool;

    #[FieldValidators(
        new Datetime\After('2000-01-01'),
        new Datetime\Before('2025-12-31'),
        new Datetime\Between('2000-01-01', '2026-01-01'),
    )]
    protected \DateTimeInterface $datetime;

    #[FieldValidators(
        new Mixed\In([100, 'paid', true]),
        new Mixed\Required(),
        new Mixed\Requires(['string', 'bool']),
    )]
    protected string $mixed;

    #[FieldValidators(
        new Array\CountBetween(1, 100),
        new Array\CountMin(1),
        new Array\CountMax(10),
        new Array\Unique(),
        new Array\UniqueIntegers(),
    )]
    protected array|int $ints;

    #[FieldValidators(
        new Array\UniqueStrings(),
    )]
    protected array|string $strings;
}

$data = [
    'int'      => 5,
    'string'   => 'Mask', 'Trump',
    'bool'     => true,
    'datetime' => '2020-06-15',
    'mixed'    => 'paid',
    'ints'     => [2, 5],
    'strings'  => ['Elon', 'Trump'],
];

try {
    $dto = new ExampleDto($data);
} catch (ValidationExceptions $e) {
    print_r($e->toArray());
}

Output:

Array
(
    [0] => Array
        (
            [field] => int
            [error] => Int must be at least 10
            [path]  => int
        )

    [1] => Array
        (
            [field] => string
            [error] => String must be a valid card number
            [path]  => string
        )
    ...
)

ArrayValidators - example

ArrayValidators - validate each item of array

use DtoPacker\AbstractDto;
use DtoPacker\Validators\ArrayValidators;
use DtoPacker\Validators\Numeric\Max;
use DtoPacker\Validators\Numeric\Min;

class ExampleDto extends AbstractDto
{
    #[ArrayValidators(
        new Min(10),
        new Max(20),
    )]
    protected int $ints;
}

$data = [
    'ints' => [5, 15, 25],
];

try {
    $dto = new ExampleDto($data);
} catch (ValidationExceptions $e) {
    print_r($e->toArray());
}

Output:

Array
(
    [0] => Array
        (
            [field] => ints
            [error] => [0] ints must be at least 10
            [path]  => ints[0]
            [index] => Array
                (
                    [0] => 0
                )

        )
    [1] => Array
        (
            [field] => ints
            [error] => [2] ints may not be greater than 20
            [path]  => ints[2]
            [index] => Array
                (
                    [0] => 2
                )

        )
)

Chain of validators - example

use DtoPacker\AbstractDto;
use DtoPacker\Validators\FieldValidators;
use DtoPacker\Validators\Numeric\Max;

class ExampleDto extends AbstractDto
{
    #[FieldValidators(
        [
            new Max(10), 
            new Max(20), // will be skipped if one of the previous validators returns an error
        ],
        new Max(30)
    )]
    protected int $int;
}

$data = [
    'ints' => [5, 15, 25],
];

try {
    $dto = new ExampleDto($data);
} catch (ValidationExceptions $e) {
    print_r($e->toArray());
}

Output:

Array
(
    [0] => Array
        (
            [field] => int
            [error] => Int may not be greater than 10
            [path]  => int
        )

    [1] => Array
        (
            [field] => int
            [error] => Int may not be greater than 30
            [path]  => ints
        )

)

Dimension

use DtoPacker\AbstractDto;
use DtoPacker\Dimension;

class ExampleDto extends AbstractDto
{
    #[Dimension(2)]
    protected array|int $ints;
}

$data = [
    'ints' => [[5, 15, 25], [100, 200]],
];

$dto = new ExampleDto($data);
print_r($dto->toArray());

Output:

Array
(
    [ints] => Array
        (
            [0] => Array
                (
                    [0] => 5
                    [1] => 15
                    [2] => 25
                )

            [1] => Array
                (
                    [0] => 100
                    [1] => 200
                )

        )

)

Benchmark

Check out the benchmark comparison of popular libraries