All 7 Asynchronous PHP (ReactPHP & Swoole) questions
More in Asynchronous PHP (ReactPHP & Swoole)
What does asynchronous programming mean in PHP, and why is it different from PHP's traditional synchronous execution model? What is Swoole, and how does it extend PHP with built in support for coroutines and high performance networking? How do coroutines in Swoole let you write asynchronous code using a familiar, synchronous looking coding style? What types of real world applications are best suited for asynchronous PHP frameworks like ReactPHP or Swoole, compared to traditional synchronous PHP applications? What common pitfalls should developers be aware of when writing asynchronous PHP code with Swoole, particularly around shared state and blocking calls? How should a team decide whether to adopt an asynchronous PHP framework like Swoole for a new project, versus sticking with a traditional synchronous framework like Laravel running on PHP-FPM?
Advertisement
Back to results for “Closures”
PHP › Asynchronous PHP (ReactPHP & Swoole)

What is ReactPHP and how does its event loop enable non blocking, asynchronous behavior in standard PHP?

Beginner

Answer

ReactPHP is a library that provides an event driven, non blocking input and output model for PHP, built around a central event loop that continuously checks for completed operations, such as a finished network request, and calls the appropriate callback function when that operation completes, letting a single PHP process handle many operations concurrently without needing to wait idly for each one to finish before starting the next.
$loop = React\EventLoop\Loop::get();
$loop->addTimer(2, function () {
    echo "Two seconds have passed\n";
});
$loop->run();
Real-world example A real time notification server built with ReactPHP handles thousands of open client connections simultaneously within a single process, using the event loop to efficiently respond to each client only when there is actually new data to send.

Common follow-ups: What is a callback function and how does it relate to the event loop?;How does ReactPHP compare to using traditional PHP-FPM for web requests?

Closures & Anonymous Functions;RESTful API Development with PHP
All 7 Asynchronous PHP (ReactPHP & Swoole) questions