PHP의 동시성과 병렬성 탐색: 실습 튜토리얼 및 팁

<?php
// Check if pcntl is available
if (!function_exists('pcntl_fork')) {
    die('The pcntl extension is not available.');
}

$pid = pcntl_fork();

if ($pid == -1) {
    // Fork failed
    die('Could not fork');
} elseif ($pid) {
    // Parent process
    echo "Parent Process\n";
    pcntl_wait($status); // Wait for child process to finish
} else {
    // Child process
    echo "Child Process\n";
    sleep(2); // Simulate a task
    echo "Child Process Finished\n";
}
?>

composer require react/event-loop

<?php
require 'vendor/autoload.php';

use React\EventLoop\Factory;
use React\Promise\PromiseInterface;

$loop = Factory::create();

// Function to simulate an asynchronous task
function asyncTask($name) {
    return new PromiseInterface(function ($resolve, $reject) use ($name) {
        echo "Starting $name...\n";
        sleep(2); // Simulate a delay
        echo "$name completed.\n";
        $resolve();
    });
}

$promise1 = asyncTask('Task 1');
$promise2 = asyncTask('Task 2');

// Wait for all promises to complete
$loop->run();
?>

<?php
// Check if parallel is available
if (!extension_loaded('parallel')) {
    die('The parallel extension is not available.');
}

use parallel\{Runtime, Future};

// Function to run in parallel
function task($name) {
    echo "Task $name started\n";
    sleep(2); // Simulate a task
    echo "Task $name completed\n";
}

// Create runtime environments
$runtime1 = new Runtime();
$runtime2 = new Runtime();

// Start tasks in parallel
$future1 = $runtime1->run(function() {
    task('1');
});
$future2 = $runtime2->run(function() {
    task('2');
});

// Wait for tasks to complete
$future1->value();
$future2->value();
?>

<?php
// Check if pthreads is available
if (!extension_loaded('pthreads')) {
    die('The pthreads extension is not available.');
}

class Worker extends Thread {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function run() {
        echo "Thread {$this->name} started\n";
        sleep(2); // Simulate a task
        echo "Thread {$this->name} completed\n";
    }
}

$worker1 = new Worker('1');
$worker2 = new Worker('2');

// Start threads
$worker1->start();
$worker2->start();

// Join threads to main script
$worker1->join();
$worker2->join();
?>