parallel/example/thread.php

#!/usr/bin/env php
<?php
require dirname(__DIR__).'/vendor/autoload.php';

use Amp\Parallel\Threading\Thread;
use Amp\Pause;
use AsyncInterop\Loop;

Loop::execute(Amp\wrap(function () {
    $timer = Loop::repeat(1000, function () {
        static $i;
        $i = $i ? ++$i : 1;
        print "Demonstrating how alive the parent is for the {$i}th time.\n";
    });
    
    try {
        // Create a new child thread that does some blocking stuff.
        $context = Thread::spawn(function () {
            printf("\$this: %s\n", get_class($this));
        
            printf("Received the following from parent: %s\n", yield $this->receive());
        
            print "Sleeping for 3 seconds...\n";
            sleep(3); // Blocking call in thread.
        
            yield $this->send("Data sent from child.");
        
            print "Sleeping for 2 seconds...\n";
            sleep(2); // Blocking call in thread.
        
            return 42;
        });
    
        print "Waiting 2 seconds to send start data...\n";
        yield new Pause(2000);
    
        yield $context->send("Start data");
    
        printf("Received the following from child: %s\n", yield $context->receive());
        printf("Thread ended with value %d!\n", yield $context->join());
    } finally {
        Loop::cancel($timer);
    }
}));