Update a DB using data retrived from a while loop - php

Question

I Have a table named FRANCE like this
City Region LAT LNG
PARIS L'Ile-de-France
MARSEILLE Provenza
Now, LAT and LNG values I retrieve throught a function that use google api. To do this I must concatenate City and Region
So this is what I do:
$sql="Select * from France";
$result=mysql_query($sql) or die(mysql_error());
while($row=mysql_fetch_array($result)){
$city=$row['city'];
$region=$row['region'];
$address=$city.",".$region.", France";
$coordinates = file_get_contents('http://maps.googleapis.com/maps/api/geocode/json?address=' . urlencode($address) . '&sensor=true');
$coordinates = json_decode($coordinates);
$lat = $coordinates->results[0]->geometry->location->lat;
$lng = $coordinates->results[0]->geometry->location->lng;
}
Now I'd like to update the table FRANCE to have this output
City Region LAT LNG
PARIS L'Ile-de-France 48.856614 2.352222
MARSEILLE Provenza 43.296482 5.369780
How can I do?

Answer 1

It's quite straightforward, just like the comments above, you already got the fetching of results and made the request. After gathering the response from the request just make that UPDATE statement.
Obligatory note:
Please, don't use mysql_* functions in new code. They are no longer maintained and are officially deprecated. See the red box? Learn about prepared statements instead, and use PDO or MySQLi - this article will help you decide which. If you choose PDO, here is a good tutorial.
Here is a rough untested example using mysqli with prepared statements. Of course you need to modify those items:
// first step connect and make the first query
$db = new mysqli('localhost', 'username', 'password', 'database');
$sql = 'SELECT * FROM france';
$query = $db->query($sql);
while($row = $query->fetch_assoc()) {
// fetch and assign results
$id = $row['id'];
$city = $row['city'];
$region = $row['region'];
$address = $city.",".$region.", France";
// make the google request and gather results
$coordinates = file_get_contents('http://maps.googleapis.com/maps/api/geocode/json?address=' . urlencode($address) . '&sensor=true');
$coordinates = json_decode($coordinates);
// check if there are results
if($coordinates != null) {
$lat = $coordinates->results[0]->geometry->location->lat;
$lng = $coordinates->results[0]->geometry->location->lng;
// make the update
$sql2 = 'UPDATE france SET `LAT` = ?, `LNG` = ? WHERE id = ?';
$update = $db->prepare($sql2);
// i don't know if this is double column or varchar
$update->bind_param('ddi', $lat, $lng, $id);
$update->execute();
}
}