How to refresh leaflet markers after some interval

I have made leaflet map with following code which uses longitude and latitude from mysql database as given below

<script>

    var planes = [

<?php


          $DB = mysqli_connect('localhost','username','password','abc');
          $Q = "SELECT location, length, width FROM abcstat WHERE siteid='xyz'";
          $R = mysqli_query($DB,$Q);
          //start loop
          //while or foreach
$results=[];                                                     // define array
while($row = mysqli_fetch_assoc($R)){
    $results[] = "['{$row['location']}',{$row['length']},{$row['width']}]";  // add to array
}
$final = join(",\r\n", $results);

echo $final;

          ?>
       
        ];

        var map = L.map('map').setView([19.426216, 15.7166481], 1);
        mapLink =
            '<a href="http://openstreetmap.org">OpenStreetMap</a>';
        L.tileLayer(
            'http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
            attribution: '&copy; ' + mapLink + ' Contributors',
            maxZoom: 8,
            }).addTo(map);

        for (var i = 0; i < planes.length; i++) {
            marker = new L.marker([planes[i][1],planes[i][2]])
                .bindPopup(planes[i][0])
                .addTo(map);
        }
              
    </script>

Code (markup):

This load a map in div with marker loaded by above mysql query. div is given below

<div id="map" style="width: 650px; height: 400px"></div>

Code (markup):

and this works perfectly and shows marker points when page is loaded. But i want to refresh marker points after some time say 10 sec etc.without reloading web page. How to do this. Thanks in advance

 

Use setInterval()

use ajax to get data from server then

 

How to do that?