format("Y-m-d"); error_log("date " . $date); $attendance_id = -1; if (!empty($date)) { $check = "select * from attendance_master where attendance_date = '" . $date . "'"; error_log("query " . $check); $result = mysqli_query($conn, $check); if (mysqli_num_rows($result) > 0) { $row = mysqli_fetch_assoc($result); $attendance_id = $row['attendance_id']; } } echo json_encode($attendance_id);