CSV output is duplicated - php

Question

I am trying to output the database selected rows in csv format, but it outputs me duplicated values instead of single one. I want it to have columns and below the column the value. The output:
onlineId,paramId,paramValue 4cd87b00dddca780fcaf66d0108b25f6,4cd87b00dddca780fcaf66d0108b25f6,1,1,11,11
The code below:
$output = fopen('php://output', 'w');
fputcsv($output, array('onlineId', 'paramId', 'paramValue'));
$host = "localhost";
$database = "keytarget";
$username = "root";
$password = "";
$con = new PDO("mysql:host=" . $host . ";dbname=" . $database, $username, $password);
//Run our query
$sql = "
SELECT
ui.onlineId, uin.paramId, uin.paramValue
FROM
v5_userinfo ui
JOIN
v5_userinfo_number uin
ON
uin.userId = ui.id
;
";
$statement = $con->prepare($sql);
$statement->execute();
while ($row = $statement->fetch()) {
fputcsv($output, $row);
}

Answer 1

That's becouse when you retrieve the data it gives you a mix between an associative array and a normal array More info. So your $row var is something like:
array(
[0]=>4cd87b00dddca780fcaf66d0108b25f6
[onlineId]=>4cd87b00dddca780fcaf66d0108b25f6
[1]=>1
[paramId]=>1
[2]=>11
[paramValue]=>11
)
So your solution could be:
while ($row = $statement->fetch()) {
$array=array($row[0],$row[1],$row[2]);
fputcsv($output, $array);
}
Or an easier one:
while ($row = $statement->fetch(PDO::FETCH_ASSOC)) {
fputcsv($output, $row);
}