store_result() and get_result() in mysql returns false
Solution 1:
Use get_result() instead of store_result(), and then use the result object's num_rows:
$a->execute();
$res = $a->get_result();
if ($res->num_rows > 0) {
while ($row = $res->fetch_assoc()) {
$results[] = $row;
}
return $results;
} else {
return false;
}