public function savecell()
{
try {
$excel = new Excel();
$col = filter_input(INPUT_POST, 'col', FILTER_SANITIZE_NUMBER_INT);
$row = filter_input(INPUT_POST, 'row', FILTER_SANITIZE_NUMBER_INT);
$value = filter_input(INPUT_POST, 'value', FILTER_SANITIZE_STRING);
$param = array('col' => $col, 'row' => $row, 'value' => $value);
$excel->save_cell_value($param);
$result = array('status' => 'OK', 'msg' => $value);
echo json_encode($result);
} catch (Exception $ex) {
$result = array('status' => 'ERROR', 'msg' => $ex->getMessage());
echo json_encode($result);
}
}