How can I load a PHP file every 5 seconds with JavaScript

Question

I want a php program to be executed every 5 seconds using JavaScript. How can I do that?

I tried using:

<script type="text/javascript">
    setInterval(
        function (){
            $.load('update.php');
        },
        5000
    );
</script>

But it doesn't work.

you could use a non-blocking server such as nodejs, or implement your php websocket server — Jonathan de M.
– Jonathan de M., Commented Dec 28, 2012 at 8:53
AJAX request on a 5 second timer. (Not saying it's a good idea) — Cerbrus
– Cerbrus, Commented Dec 28, 2012 at 8:55
you should make sure that jQuery is loaded at this time so start with $(function() { ... your set interval and other code... }); then it should work. — wildhaber
– wildhaber, Commented Dec 28, 2012 at 22:01

Elliot B. · Accepted Answer · 2012-12-28 09:01:24Z

17

Using jQuery and setInterval:

setInterval(function() {
    $.get('your/file.php', function(data) {
      //do something with the data
      alert('Load was performed.');
    });
}, 5000);

Or without jQuery:

setInterval(function() {
    var request = new XMLHttpRequest();
    request.onreadystatechange = function() {
         if (request.readyState == 4 && request.status == 200) {
            console.log(request.responseText);
         }
      }
    request.open('GET', 'http://www.blahblah.com/yourfile.php', true);
    request.send();

}, 5000);

edited Dec 28, 2012 at 9:01

answered Dec 28, 2012 at 8:55

Elliot B.

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2 Comments

Cerbrus Over a year ago

I have a feeling there's some "Downvote the competition" on SO going on, users downvoting other answers on posts they answered.

Cerbrus Over a year ago

@Dabido: In that case, I didn't say anything :P Good sportsmanship :D

patchrail · Accepted Answer · 2012-12-28 08:59:55Z

7

Try using setInterval() to perform a XHR call. (jQuery, non jQuery)

setInterval(function() {
    // Ajax call...
}, 5000);

This will execute your code inside the function every 5 secs

edited Dec 28, 2012 at 8:59

answered Dec 28, 2012 at 8:55

patchrail

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3 Comments

Cole Tobin Over a year ago

He wants to execute PHP with JavaScript. Not JavaScript with JavaScript. However +1 for helping a help vampire

Cerbrus Over a year ago

@ColeJohnson: The only way to execute php from JavaScript is to do a AJAX call, to request a php page.

Cole Tobin Over a year ago

@Cerbrus I am aware AJAX is the solution. I'm just pointing out that your code doesn't give any indication of Ajax

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