function leer_actividades($query, $dbhandler)
{
$table = $dbhandler->query($query);
$result = array();
if ($table->num_rows > 0) {
// output data of each row
while ($row = $table->fetch_assoc()) {
$actividad = new Actividad();
$actividad->read_actividad($row);
$result[] = $actividad;
}
} else {
echo "no results";
}
return $result;
}