parallel\Channel::open

<?php
// example below shows how to get channel by name within child thread with Channel::open()
use parallel\{Channel, Runtime};
$fnThread = static function () {
 $channel = Channel::open('channel_name');
 $message = $channel->recv();
 echo "- received message: $message\n";
 return 'bye';
};
$channel = Channel::make('channel_name', 1);
// main thread
$runtime = new Runtime();
$future = $runtime->run($fnThread, [$channel]);
echo "sending message\n";
$channel->send('hello future!');
sleep(1);
echo "closing channel\n";
$channel->close();
echo "future said: ".$future->value();
echo PHP_EOL;