如何使用php ajax进行file_get_contents和刷新数据而无需重新加载页面

Question

I am taking some json data from an API using php. I'd like the data to refresh every 20 seconds without having to manually reload the page. This is my code below that works great at fetching the data. Just need to figure out how to refresh - maybe with ajax?

$getdata = file_get_contents("https://data.website.com/");
$datajson = json_decode($getdata);
$mydata = $datajson->whatiwant;
echo $mydata;

Answer 1

request your data using AJAX:

function requestMyData() {
    $.ajax({
        url: "/url/to/interface.php",
        type: get,
        success: function(data) {
            //update your UI here
        }
    });
}

you are then able to request the data using a timeout:

setTimeout(requestMyData(), 100);