PHP code example of async-interop / promise

1. Go to this page and download the library: Download async-interop/promise library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php. 
    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

async-interop / promise example snippets




namespace AsyncInterop;

/**
 * Representation of the future value of an asynchronous operation.
 */
interface Promise
{
    /**
     * Registers a callback to be invoked when the promise is resolved.
     *
     * If the promise is already resolved, the callback MUST be executed immediately.
     *
     * @param callable(\Throwable|\Exception|null $reason, $value) $onResolved `$reason` shall be `null` on
     *     success, `$value` shall be `null` on failure.
     *
     * @return mixed Return type and value are unspecified.
     */
    public function when(callable $onResolved);
}