PENDING
PENDING = 'pending'
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.
then(callable $onFulfilled = null, callable $onRejected = null) : \GuzzleHttp\Promise\PromiseInterface
Appends fulfillment and rejection handlers to the promise, and returns a new promise resolving to the return value of the called handler.
| callable | $onFulfilled | Invoked when the promise fulfills. |
| callable | $onRejected | Invoked when the promise is rejected. |
otherwise(callable $onRejected) : \GuzzleHttp\Promise\PromiseInterface
Appends a rejection handler callback to the promise, and returns a new promise resolving to the return value of the callback if it is called, or to its original fulfillment value if the promise is instead fulfilled.
| callable | $onRejected | Invoked when the promise is rejected. |
wait(boolean $unwrap = true) : mixed
Waits until the promise completes if possible.
Pass $unwrap as true to unwrap the result of the promise, either returning the resolved value or throwing the rejected exception.
If the promise cannot be waited on, then the promise will be rejected.
| boolean | $unwrap |
if the promise has no wait function or if the promise does not settle after waiting.