<?php
$conn = mysqli_connect("localhost", "root", "S1stemas", "crm");
$query = "SELECT temp, hum FROM temperature WHERE id = (SELECT MAX(id) FROM temperature)";
$result = $conn->query($query);
$data = $result->fetch_assoc();
$temp = isset($data['temp']) ? $data['temp'] : 0;
$hum = isset($data['hum']) ? $data['hum'] : 0;
echo json_encode(array($temp, $hum));
?>