Formatting json to geojson via PHP - php

Question

I am trying to get some data that I have called from a mySQL database to correctly display in a GeoJSON format. Here's some of my PHP code:
$data = array(); //setting up an empty PHP array for the data to go into
if($result = mysqli_query($db,$query)) {
while ($row = mysqli_fetch_assoc($result))
{
$data[] = $row;
}
}
$jsonData =json_encode($data);
$original_data = json_decode($jsonData, true);
$coordinates = array();
foreach($original_data as $key => $value) {
$coordinates[] = array($value['latitude'], $value['longitude']);
}
$new_data = array(
'type' => 'FeatureCollection',
'features' => array(array(
'type' => 'Feature',
'properties' => array('time' => $value['time']),
'geometry' => array('type' => 'Point', 'coordinates' => $coordinates),
),
),
);
$final_data = json_encode($new_data, JSON_PRETTY_PRINT);
print_r($final_data);
I've managed to get my results to look like this so far:
But I need them to look like this so that every set of coordinates has its own "type" and "properties" key-value pair:
I've already found some help with this issue here, but I just can't manage to get over this last formatting hurdle...

Answer 1

Instead of building coordinates, you need to build features:
$data = array(); //setting up an empty PHP array for the data to go into
if($result = mysqli_query($db,$query)) {
while ($row = mysqli_fetch_assoc($result))
{
$data[] = $row;
}
}
$jsonData =json_encode($data);
$original_data = json_decode($jsonData, true);
$features = array();
foreach($original_data as $key => $value) {
$features[] = array(
'type' => 'Feature',
'properties' => array('time' => $value['time']),
'geometry' => array(
'type' => 'Point',
'coordinates' => array(
$value['latitude'],
$value['longitude'],
1
),
),
);
}
$new_data = array(
'type' => 'FeatureCollection',
'features' => $features,
);
$final_data = json_encode($new_data, JSON_PRETTY_PRINT);
print_r($final_data);