PHP:write_socket（）给出意外警告

我正在尝试设置WebSocket应用程序，但我在以下方面遇到了困难。 在接受套接字之后，我收到了预期的客户端头，但是当我尝试发回升级时

socket\u write（）

抛出一个警告：

Warning: socket_write(): unable to write to socket [10038]: An operation was attempted on something that is not a socket

这在以下代码段中发生：

var_dump($this->socket); //output: resource(2) of type (Socket)
socket_write($this->socket, $upgrade);

这在pthreads上下文中发生。
PHP向我发出此警告的可能原因是什么

完整代码：

public function handshake($headers)
{
    Main::console($headers);
    Main::console("Getting client WebSocket version...");
    Main::console("Headers: \r\n\r\n".$headers);
    if(preg_match("/Sec-WebSocket-Version: (.*)\r\n/", $headers, $match))
        $version = $match[1];
    else {
        Main::console("The client doesn't support WebSocket");
        return false;
    }

    Main::console("Client WebSocket version is {$version}, (required: 13)");
    if($version == 13) {
        // Extract header variables
        Main::console("Getting headers...");
        if(preg_match("/GET (.*) HTTP/", $headers, $match))
            $root = $match[1];
        if(preg_match("/Host: (.*)\r\n/", $headers, $match))
            $host = $match[1];
        if(preg_match("/Origin: (.*)\r\n/", $headers, $match))
            $origin = $match[1];
        if(preg_match("/Sec-WebSocket-Key: (.*)\r\n/", $headers, $match))
            $key = $match[1];

        Main::console("Client headers are:\r\n\r\n".
                        "- Root: ".$root."\r\n".
                        "- Host: ".$host."\r\n".
                        "- Origin: ".$origin."\r\n".
                        "- Sec-WebSocket-Key: ".$key."\n");

        Main::console("Generating Sec-WebSocket-Accept key...");
        $acceptKey = $key.'258EAFA5-E914-47DA-95CA-C5AB0DC85B11';
        $acceptKey = base64_encode(sha1($acceptKey, true));

        $upgrade = "HTTP/1.1 101 Switching Protocols\r\n".
                   "Upgrade: websocket\r\n".
                   "Connection: Upgrade\r\n".
                   "Sec-WebSocket-Accept: $acceptKey".
                   "\r\n\r\n";

        Main::console("Sending this response to the client #{$this->getId()}:\r\n\r\n".$upgrade);
        var_dump($this->socket);
        socket_write($this->socket, $upgrade, strlen($upgrade));
        $this->setHandshake(true);
        Main::console("Handshake is successfully done!");
        return true;
    }
    else {
        Main::console("WebSocket version 13 required (the client supports version {$version})");
        return false;
    }
}

public function run()
{
while($this->alive)
{
    $bytes = @socket_recv($this->socket, $buffer, 4096, MSG_WAITALL);
    if ($buffer)
        {
        if(!$this->handshake)
        {
            $this->handshake($buffer);
        } else {
            Main::console("Client {$this->getID()} says {$buffer}");
        }
    }
}

---

}

有关详细信息，请尝试

socket\u last\u error（）

和

socket\u strerror（）

。如果这没有帮助，请向我们展示如何创建套接字。来源：

您可能希望向我们展示用于此目的的代码。我接受了，因为我只是需要说明。我原以为PHP给我的警告与socket\u last\u error（）机制相同，但显然不是这样！