Swoole server.php global variable data can only be put in two?

It's only been two.

Four clients have been opened ...

  Push ($FD, $msg); }}}//Listen WebSocket connection Open event $ws->on (' Open ', function (Swoole_websocket_server $ws, $request) use (& $fds) {$fds [$r    EQUEST->FD] = $request->fd;    $ws->push ($request->fd, "Welcome to the small Mon chat platform \ n"); Broadcast ($WS, "User {$request->fd} is logged in!    ", $fds, $request->fd); Var_dump ($fds);}); /Listen for WebSocket message Event $ws->on (' Message ', function (Swoole_websocket_server $ws, $frame) use (& $fds) {$msg = ' from '. $    Frame->fd. ": {$frame->data}\n";   Broadcast ($WS, $msg, $fds, $frame->fd);    $ws->push ($frame->fd, "server: {$frame->data}"); $ws->push ($frame->fd, "server: {$frame->data}");    /monitor WebSocket connection Shutdown Event $ws->on (' Close ', function (Swoole_websocket_server $ws, $FD) use (& $fds) {unset ($fds [$FD]); Broadcast ($WS, "user {$FD} offline!" ", $fds);}); $ws->start ();

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It's only been two.

Four clients have been opened ...

  Push ($FD, $msg); }}}//Listen WebSocket connection Open event $ws->on (' Open ', function (Swoole_websocket_server $ws, $request) use (& $fds) {$fds [$r    EQUEST->FD] = $request->fd;    $ws->push ($request->fd, "Welcome to the small Mon chat platform \ n"); Broadcast ($WS, "User {$request->fd} is logged in!    ", $fds, $request->fd); Var_dump ($fds);}); /Listen for WebSocket message Event $ws->on (' Message ', function (Swoole_websocket_server $ws, $frame) use (& $fds) {$msg = ' from '. $    Frame->fd. ": {$frame->data}\n";   Broadcast ($WS, $msg, $fds, $frame->fd);    $ws->push ($frame->fd, "server: {$frame->data}"); $ws->push ($frame->fd, "server: {$frame->data}");    /monitor WebSocket connection Shutdown Event $ws->on (' Close ', function (Swoole_websocket_server $ws, $FD) use (& $fds) {unset ($fds [$FD]); Broadcast ($WS, "user {$FD} offline!" ", $fds);}); $ws->start ();

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