问将数据添加到数据库，图表应自动更新而不刷新

EN

$mysqli = new mysqli($host,$user,$pass,$db) or die($mysqli->error);

     $time = '';
    $s01 = '';
    $s02 = '';
    $s03 = '';

    //query to get data from the table
    $sql = "SELECT * FROM `temperature` ";
    $result = mysqli_query($mysqli, $sql);

    //loop through the returned data
    while ($row = mysqli_fetch_array($result)) {

        $time = $time . '"'. $row['time'].'",';
        $sensor01 = $sensor01 . '"'. $row['s01'].'",';
        $sensor02 = $sensor02 . '"'. $row['s2'] .'",';
        $sensor03 = $sensor03 . '"'. $row['s03'] .'",';
    }

     $time = trim($time.",");
    $s01 = trim($s01,",");
    $s02 = trim($s02,",");
    $s03 = trim($s03,",");



             var ctx = document.getElementById("chart").getContext('2d');

                var myChart = new Chart(ctx, {
                type: 'line',
                data: 
                {
                    labels: [<?php echo $time; ?>],
                    datasets: 
                    [{
                        label: 'Sensor01',
                        data: [<?php echo $s01; ?>]
                    },

                    {
                        label: 'Sensor02',
                        data: [<?php echo $s02; ?>]

                    },
                    {
                        label: 'Sensor03',
                        data: [<?php echo $s03; ?>]

                    }]
                },


                options: 
                {
                    responsive: true,
                    scales:{
                        yAxes: [{beginAtZero: false, setinterval: 3000}],
                        xAxes: [{autoskip: true, maxTicketsLimit: 20}]

                },


            });