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Guzzle Promises Upgrade Guide ============================= 1.x to 2.0 ---------- Guzzle Promises 2.0 is a major release that removes deprecated APIs, raises the minimum PHP version, and adds PHP 7 parameter and return types. Applications that only use the object-oriented API should usually need small changes. Applications that call helper functions, implement package interfaces, extend package classes, or pass invalid argument types need closer review. #### PHP Version and Dependencies Guzzle Promises 2.0 requires PHP `^7.2.5 || ^8.0`. Guzzle Promises 1.x supported PHP `>=5.5`. #### PHP 7 Type Hints and Return Types Type hints and return types were added wherever possible. Please make sure: - You pass values of the documented type when calling methods and functions. - Classes that implement `PromiseInterface`, `PromisorInterface`, or `TaskQueueInterface` update method signatures to remain compatible. - Classes that extend Guzzle Promises classes update any overridden method signatures to remain compatible. - Code that expected package-specific exceptions for invalid argument types may now receive PHP `TypeError` exceptions instead. #### Soft-Final Classes All previously non-final non-exception classes are now final or annotated with `@final`. If your code extends one of these classes, replace inheritance with composition or implement the relevant interface directly. #### Removed Function API The static API was introduced in 1.4.0 to mitigate problems with functions conflicting between global and local copies of the package. The function API was removed in 2.0.0, along with the Composer `files` autoload entry that loaded `src/functions_include.php`. Replace namespaced function calls with the corresponding static methods in the `GuzzleHttp\Promise` namespace: ```php // Before: use function GuzzleHttp\Promise\promise_for; $promise = promise_for('value'); // After: use GuzzleHttp\Promise\Create; $promise = Create::promiseFor('value'); ``` | Original Function | Replacement Method | |-------------------|--------------------| | `queue` | `Utils::queue` | | `task` | `Utils::task` | | `promise_for` | `Create::promiseFor` | | `rejection_for` | `Create::rejectionFor` | | `exception_for` | `Create::exceptionFor` | | `iter_for` | `Create::iterFor` | | `inspect` | `Utils::inspect` | | `inspect_all` | `Utils::inspectAll` | | `unwrap` | `Utils::unwrap` | | `all` | `Utils::all` | | `some` | `Utils::some` | | `any` | `Utils::any` | | `settle` | `Utils::settle` | | `each` | `Each::of` | | `each_limit` | `Each::ofLimit` | | `each_limit_all` | `Each::ofLimitAll` | | `!is_fulfilled` | `Is::pending` | | `is_fulfilled` | `Is::fulfilled` | | `is_rejected` | `Is::rejected` | | `is_settled` | `Is::settled` | | `coroutine` | `Coroutine::of` | For the full 2.0 diff, see https://github.com/guzzle/promises/compare/1.5.3...2.0.0.
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