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4.x is outdated, please check the latest version 22.x
Latest version:
pecl install openswoole-22.1.2
<?php Swoole\Server->on('Request', callable $callback)
The event callback name.
Callable function.
If success, it returns true, otherwise it returns false.
Execute the callback function when receiving a new incoming HTTP request, this is the first entry point where you run your main application logic for every request, compared to traditional PHP-FPM, you could say this event callback is your index.php file. But in this example we are taking advantage of the server event loop and its on Request event.
When running a HTTP server, you don't get access to the Connect or Receive events, instead you must use Request but the Swoole HTTP server on method still acts the same.
This event is triggered when receiving a complete/whole HTTP request to the server, you will be passed two objects, Swoole/Server/Request and Swoole/Server/Response, you can use these objects to interact with the request and response of the server.
Upon this event's callback function exit or return, the given request and response objects will be destroyed, same with any class instances or variables that were created during the lifetime of this function, unless the callback type is an object defined elsewhere and no PHP closure was used.
<?php
$server = new Swoole\HTTP\Server("127.0.0.1", 9501);
$server->on('Request', function(Swoole/Server/Request $request, Swoole/Server/Response $response)
{
$response->end('<h1>Hello World! Here is a random number: ' . rand(1, 1000) . '</h1>');
});
$server->start();
Refer to the request and response documentation to learn more about them.