Compare last GPS and current GPS data - php

Question

I have a project where i need to send GPS coordinates via. socket in every 6 seconds. The coordinates are stored in a MYsql database. I run a query every 6 seconds and if the last position is different from the current position the application sends the data to the remote server. In the browser it works like a charm but in the terminal i can't use Sessions.
I tried apc_add but according to the PHP manual it is removed a long time ago.
What is the most common way to do a comparsion like that? Store the last coordinates into the database or a text file? Or is there a way to sotore it in run time?
**Here is my main code: **
<?php
require 'bootstrap.php';
use App\Libs\appServiceProvider;
use App\Libs\socketServiceProvider;
use Socket\Raw\Factory;
use App\Models\Koordinata;
$app = new appServiceProvider;
if (empty($_SESSION['lat']) || empty($_SESSION['lon'])) {
$_SESSION['lat'] = 0;
$_SESSION['lon'] = 0;
}
$lastLat = $_SESSION['lat'];
$lastLon = $_SESSION['lon'];
$currentLat = $app->getAllCoordinatesByFszgId($application['fszgId'])->last()->lat;
$currentLon = $app->getAllCoordinatesByFszgId($application['fszgId'])->last()->lon;
if ($lastLat != $currentLat && $lastLon != $currentLon) {
$factory = new Factory();
$socket = $factory->createClient('REMOTEADDRESSE');
echo "Kapcsolat létrehozva\n";
$socket->write("MESSAGE");
echo "Üzenet elküldve\n";
var_dump("Válasz: " . $socket->read(8192));
$socket->close();
} else {
echo "Idle";
$log->addDebug("GPS data NOT CHANGED! STATUS IDLE!");
}
$_SESSION['lat'] = $app->getAllCoordinatesByFszgId($application['fszgId'])->last()->lat;
$_SESSION['lon'] = $app->getAllCoordinatesByFszgId($application['fszgId'])->last()->lon;
?>

Answer 1

Okay, I did it with database and works fine. Here is the code:
<?php
require 'bootstrap.php';
use App\Libs\appServiceProvider;
use App\Libs\socketServiceProvider;
use Socket\Raw\Factory;
use App\Models\Koordinata;
use App\Models\TempKoordinata;
$app = new appServiceProvider;
$last = TempKoordinata::find(1);
if(!empty($last)) {
$lastLat = $last->lat;
$lastLon = $last->lon;
} else {
$temp = new TempKoordinata();
$temp->id = 1;
$temp->lat = 0;
$temp->lon = 0;
$temp->save();
$log->addDebug('No data to compare! Empty tempCoordinate table! Set values to ZERO!');
}
$currentLat = $app->getAllCoordinatesByFszgId($application['fszgId'])->last()->lat;
$currentLon = $app->getAllCoordinatesByFszgId($application['fszgId'])->last()->lon;
if ($lastLat != $currentLat && $lastLon != $currentLon) {
/*$factory = new Factory();
$socket = $factory->createClient('REMOTE');
echo "Kapcsolat létrehozva\n";
$socket->write("MESSAGE");
echo "Üzenet elküldve\n";
var_dump("Válasz: " . $socket->read(8192));
$socket->close();*/
echo "Sending\n";
} else {
echo "Idle\n";
$log->addDebug("GPS data NOT CHANGED! STATUS IDLE!");
}
TempKoordinata::destroy(1);
//Elmentjük a mostani GPS koordinátát
$count = TempKoordinata::all();
//Ha üres az adatbázis akkor elmentjük a koordinátákat
if ($count->count() == 0) {
$temp = new TempKoordinata();
$temp->id = 1;
$temp->lat = $currentLat;
$temp->lon = $currentLon;
$temp->save();
} else {
$log->addDebug("More than one item in the temp table!");
}
?>