PHP to GEOJSON array not looping rows in MYSQL database - php

Question

My PHP file connects successfully to a MSQL database and queries all the columns in 3 tables.
$sql = "SELECT * FROM facilitator, address, certification WHERE certification.ID=10002 LIMIT 0,3";
I'm limiting the output to 3 rows for this example.
But my array is producing multiple sets of the same user's data. It appears not to be looping through the database's rows. Here's the PHP array
// Create array
$geojson = array('type' => 'FeatureCollection', 'features' => array());
// Loop each row in database
while($row = mysqli_fetch_assoc($result)) {
$marker = array(
'type' => 'Feature',
'properties' => array(
'Name' => $row['First_Name'],
),
'geometry' => array(
'type' => 'Point',
'coordinates' => array(
$row["Longitude"], $row["Latitude"]
)
)
);
array_push($geojson['features'], $marker);
}
$json_string = json_encode($geojson, JSON_PRETTY_PRINT);
echo "<pre>".$json_string."<pre/>";
And the GEOJSON results (limited to 3 users)
{
"type": "FeatureCollection",
"features": [
{
"type": "Feature",
"properties": {
"Name": "Luz"
},
"geometry": {
"type": "Point",
"coordinates": [
"175.298090",
"-37.791458"
]
}
},
{
"type": "Feature",
"properties": {
"Name": "Luz"
},
"geometry": {
"type": "Point",
"coordinates": [
"175.298090",
"-37.791458"
]
}
},
{
"type": "Feature",
"properties": {
"Name": "Luz"
},
"geometry": {
"type": "Point",
"coordinates": [
"175.298090",
"-37.791458"
]
}
}
]
}
You can see "Luz" data is repeated each time. Can you help me with where the array is incorrect please? Thank you.

Answer 1

Okay. So, the array is working correctly, but preceded by an incorrect SQL statement requiring suitable JOIN. Something like this provides a working combination,
SELECT First_Name, Last_Name, Name
FROM facilitator
INNER JOIN certification USING (Client_ID)
WHERE facilitator.Last_Name='Smith'
I should point out that the JSON file coordinates are wrapped in quotes " which produces a string and not a number required for maps.