I'm trying to set up a TCP socket server, which should support many client connections at the same time, together with receiving and sending data.
For this purpose I'm trying to use PHP's socket_select();
due to server always hanged on socket_read();
process, where it should continue, no matter if there were data, or not. I Tried to run following code below, but it always hangs on a new client connection.
// TCP socket created
$clients = array($socket);
while (true) { // Infinite loop for server
$newsock = socket_accept($socket);
if ($newsock !== false) {
// Adds a new client
$clients[] = $newsock;
}
$read = $clients;
$write = NULL;
$except = NULL;
$num_changed_sockets = socket_select($read, $write, $except, 0);
if ($num_changed_sockets === false) {
// Error here
} else if ($num_changed_sockets > 0) {
// Something happened
if (in_array($socket, $read)) {
$key = array_search($socket, $read);
unset($read($key]);
}
foreach ($read as $read_socket) {
$data = socket_read($read_socket, 128); // This should not hang!
if ($data === false) {
// Disconnect client
}
// Reads data, sends answer...
}
}
// Something to send for all clients
}
Is it also possible to use socket_select();
without having a copy of my clients in an array, where the listener is included? Just having a clean array for clients.
默认情况下,套接字是阻塞的 ,您也应该将被动侦听套接字(在您的情况下$socket
)放入传递给socket_select
的读取集中,当您可以接受新连接时,它将可读。
Just set the listening socket $socket
to non-blocking mode. Clients get connected and data is being read, but the client disconnects are not handled in real time (there is a pretty big delay on it). Is there reason for that?
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