v3.3.0

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• Feature: Improve PHP 8.5+ support by avoiding deprecated switch case syntax.
  (#​264 by@​theodorejb)

• Feature: Run tests on PHP 8.4 and update test environment.
  (#​271 by@​clue)

v3.2.0

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• Feature: Improve PHP 8.4+ support by avoiding implicitly nullable type declarations.
  (#​260 by@​Ayesh)

• Feature: Include previous exceptions when reporting unhandled promise rejections.
  (#​262 by@​clue)

• Update test suite to improve PHP 8.4+ support.
  (#​261 by@​SimonFrings)

v3.1.0

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• Feature: Full PHP 8.3 compatibility.
  (#​255 by@​clue)

• Feature: Describe all callable arguments with types forPromise andDeferred.
  (#​253 by@​clue)

• Update test suite and minor documentation improvements.
  (#​251 by@​ondrejmirtes and#​250 by@​SQKo)

v3.0.0

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A major new feature release, seerelease announcement.

• We'd like to emphasize that this component is production ready and battle-tested.
  We plan to support all long-term support (LTS) releases for at least 24 months,
  so you have a rock-solid foundation to build on top of.

• The v3 release will be the way forward for this package. However, we will still
  actively support v2 and v1 to provide a smooth upgrade path for those not yet
  on the latest versions.

This update involves some major new features and a minor BC break over the
v2.0.0 release. We've tried hard to avoid BC breaks where possible and
minimize impact otherwise. We expect that most consumers of this package will be
affected by BC breaks, but updating should take no longer than a few minutes.
See below for more details:

• BC break: PHP 8.1+ recommended, PHP 7.1+ required.
  (#​138 and#​149 by@​WyriHaximus)

• Feature / BC break: ThePromiseInterface now includes the functionality of the oldExtendedPromiseInterface andCancellablePromiseInterface.
  Each promise now always includes thethen(),catch(),finally() andcancel() methods.
  The newcatch() andfinally() methods replace the deprecatedotherwise() andalways() methods which continue to exist for BC reasons.
  The oldExtendedPromiseInterface andCancellablePromiseInterface are no longer needed and have been removed as a consequence.
  (#​75 by@​jsor and#​208 by@​clue and@​WyriHaximus)

  // old (multiple interfaces may or may not be implemented)assert($promiseinstanceof PromiseInterface);assert(method_exists($promise,'then'));if ($promiseinstanceof ExtendedPromiseInterface) {assert(method_exists($promise,'otherwise')); }if ($promiseinstanceof ExtendedPromiseInterface) {assert(method_exists($promise,'always')); }if ($promiseinstanceof CancellablePromiseInterface) {assert(method_exists($promise,'cancel')); }// new (single PromiseInterface with all methods)assert($promiseinstanceof PromiseInterface);assert(method_exists($promise,'then'));assert(method_exists($promise,'catch'));assert(method_exists($promise,'finally'));assert(method_exists($promise,'cancel'));

• Feature / BC break: Improve type safety of promises. Requiremixed fulfillment value argument andThrowable (orException) as rejection reason.
  Add PHPStan template types to ensure strict types forresolve(T $value): PromiseInterface<T> andreject(Throwable $reason): PromiseInterface<never>.
  It is no longer possible to resolve a promise without a value (usenull instead) or reject a promise without a reason (useThrowable instead).
  (#​93,#​141 and#​142 by@​jsor,#​138,#​149 and#​247 by@​WyriHaximus and#​213 and#​246 by@​clue)

  // old (arguments used to be optional)$promise =resolve();$promise =reject();// new (already supported before)$promise =resolve(null);$promise =reject(newRuntimeException());

• Feature / BC break: Report all unhandled rejections by default and removedone() method.
  Add newset_rejection_handler() function to set the global rejection handler for unhandled promise rejections.
  (#​248,#​249 and#​224 by@​clue)

  // Unhandled promise rejection with RuntimeException: Unhandled in example.php:2reject(newRuntimeException('Unhandled'));

• BC break: Remove all deprecated APIs and reduce API surface.
  Removesome(),map(),reduce() functions, useany() andall() functions instead.
  Remove internalFulfilledPromise andRejectedPromise classes, useresolve() andreject() functions instead.
  Remove legacy promise progress API (deprecated third argument tothen() method) and deprecatedLazyPromise class.
  (#​32 and#​98 by@​jsor and#​164,#​219 and#​220 by@​clue)

• BC break: Make all classes final to encourage composition over inheritance.
  (#​80 by@​jsor)

• Feature / BC break: Requirearray (oriterable) type forall() +race() +any() functions and bring in line with ES6 specification.
  These functions now require a single argument with a variable number of promises or values as input.
  (#​225 by@​clue and#​35 by@​jsor)

• Fix / BC break: Fixrace() to return a forever pending promise when called with an emptyarray (oriterable) and bring in line with ES6 specification.
  (#​83 by@​jsor and#​225 by@​clue)

• Minor performance improvements by initializingDeferred in the constructor and avoidingcall_user_func() calls.
  (#​151 by@​WyriHaximus and#​171 by@​Kubo2)

• Minor documentation improvements.
  (#​110 by@​seregazhuk,#​132 by@​CharlotteDunois,#​145 by@​danielecr,#​178 by@​WyriHaximus,#​189 by@​srdante,#​212 by@​clue,#​214,#​239 and#​243 by@​SimonFrings and#​231 by@​nhedger)

The following changes had to be ported to this release due to our branching
strategy, but also appeared in the2.x branch:

• Feature: Support union types and address deprecation ofReflectionType::getClass() (PHP 8+).
  (#​197 by@​cdosoftei and@​SimonFrings)

• Feature: Support intersection types (PHP 8.1+).
  (#​209 by@​bzikarsky)

• Feature: Support DNS types (PHP 8.2+).
  (#​236 by@​nhedger)

• Feature: Port all memory improvements from2.x to3.x.
  (#​150 by@​clue and@​WyriHaximus)

• Fix: Fix checking whether cancellable promise is an object and avoid possible warning.
  (#​161 by@​smscr)

• Improve performance by prefixing all global functions calls with \ to skip the look up and resolve process and go straight to the global function.
  (#​134 by@​WyriHaximus)

• Improve test suite, update PHPUnit and PHP versions and add.gitattributes to exclude dev files from exports.
  (#​107 by@​carusogabriel,#​148 and#​234 by@​WyriHaximus,#​153 by@​reedy,#​162,#​230 and#​240 by@​clue,#​173,#​177,#​185 and#​199 by@​SimonFrings,#​193 by@​woodongwong and#​210 by@​bzikarsky)

The following changes were originally planned for this release but later reverted
and are not part of the final release:

• Add iterative callback queue handler to avoid recursion (later removed to improve Fiber support).
  (#​28,#​82 and#​86 by@​jsor,#​158 by@​WyriHaximus and#​229 and#​238 by@​clue)

• Trigger anE_USER_ERROR instead of throwing an exception fromdone() (later removed entiredone() method to globally report unhandled rejections).
  (#​97 by@​jsor and#​224 and#​248 by@​clue)

• Add type declarations forsome() (later removed entiresome() function).
  (#​172 by@​WyriHaximus and#​219 by@​clue)

v2.11.0

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This is a compatibility release to ensure a smooth upgrade path for those not yet
on Promise v3. We encourage upgrading to the latest version when possible, as
Promise v3 will be the way forward for this project.

• Feature: Full PHP 8.3 compatibility.
  (#​256 by@​clue)