Solved

php server time countdown javascript

Posted on 2004-04-08
2
767 Views
Last Modified: 2008-02-26
Hello!

Well basically I have a 30 minutes countdown in Javascript. Currently Javascript
get's the time from user's computer (client side). So if the user's computer clock
is incorrect then the countdown will show wrong time.

What I want is that javascript to get time from SERVER using php. So that javascript
will be based on server's time and not client side user's computer time.

the php also should have some kind of expiry date om when the countdown fully stops

I appreciate any help, thanks!

Below is the script

------------------------

<html>
<head>
<script>
  var interval, m=30, s=0;
  function countdown() {
    if(s==0) {if(m==0) {clearInterval(interval); return;} m-=1; s=60;}
    s-=1;
    document.getElementById("time").innerHTML = m + ":" + (s<10?"0":"") + s;
  }
</script>
</head>
<body onload="interval=setInterval('countdown();',1000);">
<div id="time">30:00</div>
</body>
</html>
0
Comment
Question by:blueshark123
2 Comments
 
LVL 6

Expert Comment

by:jkna_gunn
ID: 10789713
you will have to use php to generate the javascript code
then use getdate() function to pull out the time from the server.

$now = getdate();
$hours = $now['hours'];
$minutes = $now['minutes'];
$seconds = $now['seconds'];

print "<script language=\"JavaScript\">";
print "var interval,m=$minutes,s=$seconds;
...
print "</script>";

etc
0
 
LVL 5

Accepted Solution

by:
TheClickMaster earned 125 total points
ID: 10798681
<?php
// Configuration ----------------------------
//
// Change this to change the countdown time
$Time["hour"] = 19;
$Time["minute"] = 23;
$Time["second"] = 10;
//-------------------------------------------

//get the current date/time
$current_time = getdate();

// calculate the remaining minutes and seconds
$min = ($Time["hour"] - $current_time["hours"]) * 60;
$min += ($Time["minute"] - $current_time["minutes"]);
$sec = ($Time["second"] - $current_time["seconds"]);

// make sure we get something valid even if we already passed the time limit

// if the number of seconds is below 0
if ($sec < 0)
{
      // we remove 1 minute
      $min --;
      // if there really was 1 minute, we add 60 seconds
      if ($min >= 0)      $sec += 60;
}
// if the number of minutes is below 0 we adjust it to 0
if ($min < 0) $min = 0;


// display the page with the javascript
// we use $min and $ sec to initialize the variables and the display
print "
<html>
<head>
<script>
  var interval, m=".$min.", s=".$sec.";
  function countdown() {
    if(s==0) {if(m==0) {clearInterval(interval); return;} m-=1; s=60;}
    s-=1;
    document.getElementById(\"time\").innerHTML = m + \":\" + (s<10?\"0\":\"\") + s;
  }
</script>
</head>
<body onload=\"interval=setInterval('countdown();',1000);\">
<div id=\"time\">".$min.":".$sec."</div>
</body>
</html>";
?>
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Things That Drive Us Nuts Have you noticed the use of the reCaptcha feature at EE and other web sites?  It wants you to read and retype something that looks like this.Insanity!  It's not EE's fault - that's just the way reCaptcha works.  But it is …
Nothing in an HTTP request can be trusted, including HTTP headers and form data.  A form token is a tool that can be used to guard against request forgeries (CSRF).  This article shows an improved approach to form tokens, making it more difficult to…
The viewer will learn how to dynamically set the form action using jQuery.
The viewer will learn how to create a basic form using some HTML5 and PHP for later processing. Set up your basic HTML file. Open your form tag and set the method and action attributes.: (CODE) Set up your first few inputs one for the name and …

830 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question