='$fDate' and listdate<='$toDate' and city='$city' group by listdate EOF; $result = $mysqli->query($sql); $data=array(); if($result && $result->num_rows>0) { while($row = $result->fetch_assoc()){ array_push($data,array("value"=>array($row['listdate'],$row['num']))); } } return $data; } ?>