<?php

        $server="xxx";
        $user="xxxt";
        $pass="xxx";
        $db1="xxx";


        $conn = mysqli_connect($server, $user, $pass, $db1);

        if ($conn->connect_error) {
          die("Connection failed: " . $conn->connect_error);
        }

        $query = "SELECT * FROM tempLog";

        $result = $conn->query($query);

        $jsonArray = array();

        if ($result->num_rows > 0) {

          while($row = $result->fetch_assoc()) {
            $jsonArrayItem = array();
            $jsonArrayItem['label'] = $row['czas'];
            $jsonArrayItem['value'] = $row['temperature'];

            array_push($jsonArray, $jsonArrayItem);
          }
        }

        $conn->close();

       header('Content-type: application/json');

        echo json_encode($jsonArray);
?>