does the React\Promise\all returns the results in order?

[Amir-adibi]

Hello

I have a question about the React\Promise\all method.
I store the result of async calls of a method in an array and perform the all() method on it.
does the all method resolve these results in the order in which they were added to the array?

[clue]

does the React\Promise\all returns the results in order?

Yes, the all() function is guaranteed to preserve the original array (or iterator) keys and their order.

<?php

require __DIR__ . '/vendor/autoload.php';

React\Promise\all([
    'first' => new React\Promise\Promise(function (callable $resolve): void {
        React\EventLoop\Loop::addTimer(0.2, fn() => $resolve(1));
    }),
    'second' => new React\Promise\Promise(function (callable $resolve): void {
        React\EventLoop\Loop::addTimer(0.1, fn() => $resolve(2));
    })
])->then(function (array $results): void {
    var_dump($results);
});

array(2) {
  'first' =>
  int(1)
  'second' =>
  int(2)
}

https://play.phpsandbox.io/react/async/R6NgB5WAVgpx98z0

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