auroro/result

Errors as values: a Result type with Ok and Err variants

v0.5.0 2026-03-16 08:02 UTC

Requires

• php: >=8.3

Requires (Dev)

• friendsofphp/php-cs-fixer: ^3
• pestphp/pest: ^4
• pestphp/pest-plugin-type-coverage: ^4
• phpstan/phpstan: ^2

MIT

README

Errors as values: a Result type with Ok and Err variants for PHP 8.3+.

Installation

composer require auroro/result

Usage

use Auroro\Result\Ok;
use Auroro\Result\Err;
use Auroro\Result\Result;

use function Auroro\Result\ok;
use function Auroro\Result\err;

Creating results

$ok  = new Ok(42);
$err = new Err('something went wrong');

// Or use the helper functions
$ok  = ok(42);
$err = err('something went wrong');

Checking and unwrapping

$result->isOk();       // true | false
$result->isErr();      // true | false
$result->unwrap();     // returns value or throws LogicException
$result->error();      // returns error or throws LogicException
$result->unwrapOr(0);  // returns value or the default

Transforming

// Map the success value
ok(2)->map(fn ($v) => $v * 3);  // Ok(6)

// Chain into another Result
ok(10)->andThen(fn ($v) => $v > 0 ? ok($v) : err('negative'));

// Map the error
err('fail')->mapError(fn ($e) => "wrapped: $e");  // Err("wrapped: fail")

Static factories

// Wrap a callable — exceptions become Err
Result::try(fn () => riskyOperation());  // Ok(value) | Err(Throwable)

// Collect results — short-circuits on first Err
Result::all([ok(1), ok(2), ok(3)]);  // Ok([1, 2, 3])
Result::all([ok(1), err('x')]);      // Err('x')

// Null check
Result::from($value, 'missing');  // Ok($value) if non-null, Err('missing') if null

License

MIT