Swoole\WebSocket\Server->on

Declaration

<?php
Swoole\WebSocket\Server->on (string $event, callable $callback)

Parameters

event

The event name

callback

callback function

Return

success

if success, it returns TRUE, otherwise it returns FALSE.

Description

Register callback function for the event.

  • Swoole\WebSocket\Server->on('start', fn)
  • Swoole\WebSocket\Server->on('open, fn)
  • Swoole\WebSocket\Server->on('handshake, fn)
  • Swoole\WebSocket\Server->on('message, fn)
  • Swoole\WebSocket\Server->on('close, fn)
  • Swoole\WebSocket\Server->on('request, fn)

    The callback function on request in Swoole\WebSocket\Server is same as the request callback function in HTTP server, if it is not implemented, the server responses HTTP 400 error.

    Example

    <?php
    
    use Swoole\WebSocket\Server;
    use Swoole\Http\Request;
    use Swoole\WebSocket\Frame;
    
    $server = new Server("0.0.0.0", 9502);
    
    $server->on("start", function (Server $server) {
        echo "Swoole WebSocket Server is started at http://127.0.0.1:9502\n";
    });
    
    $server->on('open', function(Server $server, Swoole\Http\Request $request) {
        echo "connection open: {$request->fd}\n";
        $server->tick(1000, function() use ($server, $request) {
            $server->push($request->fd, json_encode(["hello", time()]));
        });
    });
    
    $server->on('message', function(Server $server, Frame $frame) {
        echo "received message: {$frame->data}\n";
        $server->push($frame->fd, json_encode(["hello", time()]));
    });
    
    $server->on('close', function(Server $server, int $fd) {
        echo "connection close: {$fd}\n";
    });
    
    $server->start();