TCP服务器（php）

Question

I have a gps simulator, which sends continuous location data (nmea strings) through tcpip to 192.168.0.178:2323. How do I get that data using tcp socket and write to DB (php & mysql)?

Thanks!

Answer 1

This is a loaded question. First you need to read the data. Then you have to put some structure to the data for it to be usable. It doesn't do you much good to just dump lat-lon to a database. You probably want to save it as a waypoint or part of a track etc.

So I have no answer to the DB question. Here is part of the PHP program I use to read GPS data off my phone connected to a CradlePoint router. It's modified from GoogleNav code.

function read_gps() {
        set_time_limit(5);
        $fp = fsockopen ("192.168.0.1", 8080, $errno, $errstr, 30);
        if (!$fp) {
           die ("$errstr ($errno)");
        }
        $point=false;
        $status="";
        $fix=0;
        while (!$point) {
                $string=@fgets($fp, 4096);
                switch (substr($string,0,6)) {
                        case "\$GPRMC" :
                                list($sentence, $time, $status, $latitude, $NS, $longitude, $EW, $speed, $course, $date, $magvar, $magvarEW)= explode(",", trim($string));
                                $latd=convdec($latitude, $NS);
                                $lond=convdec($longitude, $EW);
                                break;
                        case "\$GPGGA" :
                                list($sentence, $time, $latitude, $NS, $longitude, $EW, $fix, $nbsat, $HDOP, $altitude,,,,,)= explode(",", trim($string));
                                $latd=convdec($latitude, $NS);
                                $lond=convdec($longitude, $EW);
                                break;
                        default :
                        break;
                }

                if ($status=="A" and $fix == 1){
                        $point=true;
                }
        }
        ...

?>