$sql = "SELECT $user_id , SUM(views) AS value_sum FROM Wo_Posts WHERE `time` >= DATE_SUB( CURRENT_DATE, INTERVAL 90
DAY )
ORDER BY SUM(`views`) DESC LIMIT 10";
$result = $conn->query($sql);
if ($result->num_rows > 0) {
// output data of each row
while($row = $result->fetch_assoc()) {
echo " " . $row["value_sum"];
}
} else {
echo "0 results";
}