resolve.php

<?php

function resolve($promiseOrValue = null)
{
    if ($promiseOrValue instanceof ReactPromiseInterface) {
        return $promiseOrValue;
    }
    
    // Create a React\Promise from a foreign promise
    if ($promiseOrValue instanceof FigPromiseInterface) {
        return new Promise(function ($resolve, $reject, $notify) use ($promiseOrValue) {
            $promiseOrValue->then($resolve, $reject, $notify);
        });
    }
    
    return new FulfilledPromise($promiseOrValue);
}