//manage multiple connections
$changed = $clients;
//returns the socket resources in $changed array
if (count($changed) > 0) {
socket_select($changed, $null, $null, 0);
}
//check for new socket
if (in_array($sock, $changed)) {
$socket_new = socket_accept($sock);
//accept new socket
$clients[] = $socket_new;
//add socket to client array
$found_socket = array_search($socket_new, $clients);
$header = socket_read($socket_new, 1024);
//read data sent by the socket
perform_handshaking($header, $socket_new, $host, $port);
//perform websocket handshake
socket_getpeername($socket_new, $address, $port);
//get ip address of connected socket
$address_clients[$found_socket] = $address;
$found_socket = array_search($sock, $changed);
echo "Client[{$address}] connected to us on port {$port}\n";
//make room for new socket
unset($changed[$found_socket]);
}
//loop through all connected sockets
foreach ($changed as $changed_socket) {
//check for any incomming data
while (socket_recv($changed_socket, $buf, 1024, 0) >= 1) {
$received_text = unmask($buf);
//unmask data
$host = 'localhost';
$port = '3000';
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
socket_set_option($socket, SOL_SOCKET, SO_REUSEADDR, 1);
socket_bind($socket, 0, $port);
socket_listen($socket);
$clients = array($socket);
while (true) {
$changed = $clients;
socket_select($changed, NULL, NULL, 0, 10);
if (in_array($socket, $changed)) {
$newSocket = socket_accept($socket);
$clients[] = $newSocket;
$header = socket_read($newSocket, 1024);
perform_handshaking($header, $newSocket, $host, $port);
socket_getpeername($newSocket, $ip);
$found_socket = array_search($socket, $changed);
unset($changed[$found_socket]);
}
foreach ($changed as $changed_socket) {
while (socket_recv($changed_socket, $buf, 1024, 0) >= 1) {
$received_text = unmask($buf);
$tst_msg = json_decode($received_text);
$posx = $tst_msg->posx;
$posy = $tst_msg->posy;
$response_text = mask(json_encode(array('posx' => $posx, 'posy' => $posy)));
send_message($response_text);
break 2;
}
$buf = @socket_read($changed_socket, 1024, PHP_NORMAL_READ);