private $address = '0.0.0.0';
public function __construct($address = '', $port='')
$this->address = $address;
public function service(){
$tcp = getprotobyname("tcp");
$sock = socket_create(AF_INET, SOCK_STREAM, $tcp);
socket_set_option($sock, SOL_SOCKET, SO_REUSEADDR, 1);
throw new Exception("failed to create socket: ".socket_strerror($sock)."\n");
socket_bind($sock, $this->address, $this->port);
socket_listen($sock, $this->port);
echo "listen on $this->address $this->port ... \n";
$clients[] = $this->_sockets;
socket_select($changes, $write, $except, NULL);
foreach ($changes as $key => $_sock){
if($this->_sockets == $_sock){
if(($newClient = socket_accept($_sock)) === false){
die('failed to accept socket: '.socket_strerror($_sock)."\n");
$line = trim(socket_read($newClient, 1024));
$this->handshaking($newClient, $line);
socket_getpeername ($newClient, $ip);
$clients[$ip] = $newClient;
echo "Client ip:{$ip} \n";
echo "Client msg:{$line} \n";
socket_recv($_sock, $buffer, 2048, 0);
$msg = $this->message($buffer);
echo "{$key} clinet msg:",$msg,"\n";
fwrite(STDOUT, 'Please input a argument:');
$response = trim(fgets(STDIN));
$this->send($_sock, $response);
echo "{$key} response to Client:".$response,"\n";
public function handshaking($newClient, $line){
$lines = preg_split("/\r\n/", $line);
if(preg_match('/\A(\S+): (.*)\z/', $line, $matches))
$headers[$matches[1]] = $matches[2];
$secKey = $headers['Sec-WebSocket-Key'];
$secAccept = base64_encode(pack('H*', sha1($secKey . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11')));
$upgrade = "HTTP/1.1 101 Web Socket Protocol Handshake\r\n" .
"Upgrade: websocket\r\n" .
"Connection: Upgrade\r\n" .
"WebSocket-Origin: $this->address\r\n" .
"WebSocket-Location: ws://$this->address:$this->port/websocket/websocket\r\n".
"Sec-WebSocket-Accept:$secAccept\r\n\r\n";
return socket_write($newClient, $upgrade, strlen($upgrade));
public function message($buffer){
$len = $masks = $data = $decoded = null;
$len = ord($buffer[1]) & 127;
$masks = substr($buffer, 4, 4);
$data = substr($buffer, 8);
} else if ($len === 127) {
$masks = substr($buffer, 10, 4);
$data = substr($buffer, 14);
$masks = substr($buffer, 2, 4);
$data = substr($buffer, 6);
for ($index = 0; $index < strlen($data); $index++) {
$decoded .= $data[$index] ^ $masks[$index % 4];
public function send($newClinet, $msg){
$msg = $this->frame($msg);
socket_write($newClinet, $msg, strlen($msg));
public function frame($s) {
return "\x81" . chr(strlen($a[0])) . $a[0];
$ns .= "\x81" . chr(strlen($o)) . $o;
return socket_close($this->_sockets);
$sock = new SocketService();
![](https://1000bd.com/contentImg/2022/06/27/191644837.png)
浏览器发出webSocket的连线请求,服务器发出响应,这个过程称为握手
,握手的过程只需要一次,就可以实现持久连接。