A promise represents the eventual result of an asynchronous operation.
The primary way of interacting with a promise is through its then method,
which registers callbacks to receive either a promise’s eventual value or
the reason why the promise cannot be fulfilled.
| Constants |
| public GuzzleHttp\Promise\PromiseInterface::FULFILLED = 'fulfilled' |
| public GuzzleHttp\Promise\PromiseInterface::PENDING = 'pending' |
| public GuzzleHttp\Promise\PromiseInterface::REJECTED = 'rejected' |
| Methods |
| public abstract cancel() Cancels the promise if possible. |
| public abstract getState() Get the state of the promise ("pending", "rejected", or "fulfilled"). The three states can be checked against the constants defined on
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| public abstract otherwise(callable $onRejected) Appends a rejection handler callback to the promise, and returns a new |
| public abstract reject( $reason) Reject the promise with the given reason.
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| public abstract resolve( $value) Resolve the promise with the given value.
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| public abstract then(?callable $onFulfilled = NULL, ?callable $onRejected = NULL) Appends fulfillment and rejection handlers to the promise, and returns |
| public abstract wait( $unwrap = true) Waits until the promise completes if possible. Pass $unwrap as true to unwrap the result of the promise, either If the promise cannot be waited on, then the promise will be rejected.
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