PHP adaptation of some great concepts on which Rust was built.

Oxidize

Rust encourages developers to handle errors and non-values properly by design.
This leads to fewer non-logic bugs in production and the code might look cleaner as well.

The Oxidize library is written in pure PHP and has just adapted some concepts, which are also used in Rust. The method names are kept similar (snake_case to camelCase) for developers using both languages.
There are some additional wrapper methods, such as andThenContinue() in both Result and Option to get rid of return statements. A new instance will then be returned automatically.

Installation

composer require vadage/oxidize

Exceptionless

Exceptions don't have to be declared to be thrown in a method, which increases the likelihood of them not being handled.
This is where Results come in handy with their representation of Ok and Error. Calling unwrap on Error or unwrapError on Ok will lead to a ValueAccessError.

$userResult = $this->userRpc->login($email, $password);
if ($userResult->isOk()) {
    $user = $userResult->unwrap();
    $this->messages->queue(sprintf('Hello %1$s.', $user->getUsername()));
}

Null safety

It may not always be obvious if a method returns an object or null.
Instead of null, an Option can be used, which represents one of two states (Some and None). Calling unwrap on None will lead to a ValueAccessError.

$terminationDateOption = $user->getTerminationDate();
if ($terminationDateOption->isSome()) {
    $terminationDate = $terminationDateOption->unwrap();
    $this->messages->queue(sprintf('Your login will be deactivated after %1$s.', $terminationDate->format(DateTimeInterface::RSS)));
}

Monads for Result and Option

Monads can improve the codes aesthetics by getting rid of some if statements, variable declarations and unwrap calls.

$this->userRpc->login($email, $password)->andThenContinue(function (User $user) {
    $username = $user->getUsername();

    $user->getTerminationDate()
        ->andThenContinue(function (DateTime $terminationDate) {
            $formattedDate = $terminationDate->format(DateTimeInterface::RSS);
            $this->messages->queue(sprintf('Hello %1$s. Your login will be deactivated after %2$s.', $username, $formattedDate));
        })
        ->orElseContinue(function () {
            $this->messages->queue(sprintf('Hello %1$s.', $username));
        });
});