php如何发送数据给websocket,如何向特定用户发送消息Ratchet PHP Websocket
基本上你需要一个语法来发送数据到WebSocket,我建议使用 JSON 对象来做到这一点.在您的WebSocket类中,您需要一个名为subscriptions的局部变量和一个名为users的局部变量.
namespace MyApp;
use Ratchet\MessageComponentInterface;
use Ratchet\ConnectionInterface;
class Chat implements MessageComponentInterface
{
protected $clients;
private $subscriptions;
private $users;
public function __construct()
{
$this->clients = new \SplObjectStorage;
$this->subscriptions = [];
$this->users = [];
}
public function onOpen(ConnectionInterface $conn)
{
$this->clients->attach($conn);
$this->users[$conn->resourceId] = $conn;
}
public function onMessage(ConnectionInterface $conn, $msg)
{
$data = json_decode($msg);
switch ($data->command) {
case "subscribe":
$this->subscriptions[$conn->resourceId] = $data->channel;
break;
case "message":
if (isset($this->subscriptions[$conn->resourceId])) {
$target = $this->subscriptions[$conn->resourceId];
foreach ($this->subscriptions as $id=>$channel) {
if ($channel == $target && $id != $conn->resourceId) {
$this->users[$id]->send($data->message);
}
}
}
}
}
public function onClose(ConnectionInterface $conn)
{
$this->clients->detach($conn);
unset($this->users[$conn->resourceId]);
unset($this->subscriptions[$conn->resourceId]);
}
public function onError(ConnectionInterface $conn, \Exception $e)
{
echo "An error has occurred: {$e->getMessage()}\n";
$conn->close();
}
}
?>
与之相关的 javascript 看起来有点像这样
var conn = new WebSocket('ws://localhost:8080');
conn.onopen = function(e) {
console.log("Connection established!");
};
conn.onmessage = function(e) {
console.log(e.data);
};
function subscribe(channel) {
conn.send(JSON.stringify({command: "subscribe", channel: channel}));
}
function sendMessage(msg) {
conn.send(JSON.stringify({command: "message", message: msg}));
}
注意：这段代码是未经测试的,我是根据我对Ratchet的经验编写的.祝好运 ：)