Question

Is there a way to make a countdown script with PHP?

4shared.com or megaupload.com use similar script, and it starts to count from 20 seconds to 0 second.

I can clearly see how many seconds left on the web page until I can click download page.

Is this jquery?

Answer 1

This is with a simple javascript timer. It’s just as easy with native javascript as it is with jQuery (or any other library):

<script type="text/javascript">
var seconds_left = 20;
var interval = setInterval(function() {
    document.getElementById('timer_div').innerHTML = --seconds_left;
    if (seconds_left == 0)
    {
        clearInterval(interval);
        alert('do something here!');
    }
}, 1000);
</script>