PHP发送UDP消息支持绑定端口

function SendUdpMsg($service_port, $address, $msg){
    // 采用php socket技术使用UDP协议连接设备
    $socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
    @socket_set_option($socket, SOL_SOCKET, SO_RCVTIMEO, array(
        "sec" => 2,
        "usec" => 0
    ));
    // 绑定IP/PORT
    socket_bind($socket, '192.168.1.105', 8000);
    // 发送命令
    socket_sendto($socket, $msg, strlen($msg), 0, $address, $service_port);
    // if (($ret = socket_listen($socket, 5)) < 0) {
    //     echo "socket_listen() failed: reason: " . socket_strerror($ret) . "\n";
    //     exit;
    // }
    if (false !== ($bytes = socket_recv($socket, $buf, 1024,  MSG_PEEK))) {
        echo "Read $bytes bytes from socket_recv(). Closing socket...";
    } else {
        echo "socket_recv() failed; reason: " . socket_strerror(socket_last_error($socket)) . "\n";
    }
    // 关闭连接
    socket_close($socket);
    return $buf;
}