PHP JavaScript Countdown Timer

Everything you need, just enter the total time in seconds in the <span> tags. 30 and 120 here for demo. Should work if you copy and paste directly into a webpage. Add and edit code as needed.

<span id="countdown-1">30 seconds</span>
<span id="countdown-2">120 seconds</span>
<script type="text/javascript">
    // Initialize clock countdowns by using the total seconds in the elements tag
    secs       = parseInt(document.getElementById('countdown-1').innerHTML,10);
    setTimeout("countdown('countdown-1',"+secs+")", 1000);
    secs       = parseInt(document.getElementById('countdown-2').innerHTML,10);
    setTimeout("countdown('countdown-2',"+secs+")", 1000);

    /**
     * Countdown function
     * Clock count downs to 0:00 then hides the element holding the clock
     * @param id Element ID of clock placeholder
     * @param timer Total seconds to display clock
     */
    function countdown(id, timer){
        timer--;
        minRemain  = Math.floor(timer / 60);
        secsRemain = new String(timer - (minRemain * 60));
        // Pad the string with leading 0 if less than 2 chars long
        if (secsRemain.length < 2) {
            secsRemain = '0' + secsRemain;
        }

        // String format the remaining time
        clock      = minRemain + ":" + secsRemain;
        document.getElementById(id).innerHTML = clock;
        if ( timer > 0 ) {
            // Time still remains, call this function again in 1 sec
            setTimeout("countdown('" + id + "'," + timer + ")", 1000);
        } else {
            // Time is out! Hide the countdown
            document.getElementById(id).style.display = 'none';
        }
    }
</script>

Try:

var x, secs = 600; //declared globally

x = setInterval(myFunc, 1000);

function myFunc()
{
    document.getElementById('timer').innerHTML =  secs; //assuming there is a label with id 'timer'
    secs --;
    if(secs == 0)
    {
        document.getElementById('timer').style.hidden = true;
        clearInterval(x);
    }
}

There is a countdown script located at http://javascript.internet.com/time-date/countdown-timer.html that doesn't countdown to a date but rather a specified amount of minutes.

The code may be customized as follows to get the desired effect

<?php
 if ($video===1){
    $time="8:54";
 }
 if ($video===2){
    $time="5:01";
 }


?>

<script type="text/javascript" src="countDown.js"></script>

    <form name="cd">
    <input id="txt" readonly="true" type="text" value="<?php echo $time; ?>" border="0" name="disp">
    </form>

Make sure that the contents of countDown.js looks like this:

/* This script and many more are available free online at
The JavaScript Source :: http://javascript.internet.com
Created by: Neill Broderick :: http://www.bespoke-software-solutions.co.uk/downloads/downjs.php */

var mins
var secs;

function cd() {
    mins = 1 * m("10"); // change minutes here
    secs = 0 + s(":01"); // change seconds here (always add an additional second to your total)
    redo();
}

function m(obj) {
    for(var i = 0; i < obj.length; i++) {
        if(obj.substring(i, i + 1) == ":")
        break;
    }
    return(obj.substring(0, i));
}

function s(obj) {
    for(var i = 0; i < obj.length; i++) {
        if(obj.substring(i, i + 1) == ":")
        break;
    }
    return(obj.substring(i + 1, obj.length));
}

function dis(mins,secs) {
    var disp;
    if(mins <= 9) {
        disp = " 0";
    } else {
        disp = " ";
    }
    disp += mins + ":";
    if(secs <= 9) {
        disp += "0" + secs;
    } else {
        disp += secs;
    }
    return(disp);
}

function redo() {
    secs--;
    if(secs == -1) {
        secs = 59;
        mins--;
    }
    document.cd.disp.value = dis(mins,secs); // setup additional displays here.
    if((mins == 0) && (secs == 0)) {
        window.alert("Time is up. Press OK to continue."); // change timeout message as required
        // window.location = "yourpage.htm" // redirects to specified page once timer ends and ok button is pressed
    } else {
        cd = setTimeout("redo()",1000);
    }
}

function init() {
  cd();
}
window.onload = init;

 <?php 
 $countDownTime = 0;
 if ($video == 1) $countDownTime = (8*60 + 54);
 else if ($video == 2) $countDownTime = (5*60 + 1);
 echo '<script>var countdownTime="' . $countDownTime . '";</script>"'; 
 ?>

 <script>
 <!-- as per the hyper linked reference below -->
 $(selector).countdown({until: countdownTime});
 </script>

Using the following library, you can implement a JQuery timer using the var countdownTime you specify above...

http://keith-wood.name/countdown.html <-- tutorial on the first page!

Edit Replaced $someTimeInSeconds with $countDownTime

Ok, I'm looking at doing something similar. Currently I have a simple countdown timer that is based off of current time that counts down every 30min. The problem is that I have to use a meta refresh to update it. I'm wondering if a combination of javascript and PHP might be a simpler solution to this answer. Use javascript to call the php code and automatically update it? Maybe set a variable for the time in the php script to be called with javascript? Well, here's the code I have that might help. I'm still learning.

$minutes_left = ($minutes)?((30 - $minutes)-(($seconds)?1:0)):0;
$minutes_left = str_pad ($minutes_left , 2, '0', STR_PAD_LEFT);

$seconds_left = ($seconds)?(60 - $seconds):0;
$seconds_left = str_pad ($seconds_left , 2, '0', STR_PAD_LEFT);

echo '<center><h1 style="font-color:white;">Next station break in: '.$minutes_left.'m '.$seconds_left.'s</h2></center>';

?>

I just have to figure out how to get it to reset itself at the end of every 30min and to update without meta refresh.