CountDown timer PHP/JavaScript

Question

Hi I have a JavaScript for countdown which is selecting time form MySQL and it is working fine on (Chrome, Firefox), but on (IE and Safari) it is returning "NaNd NaNh NaNm NaNs".

I have attached my code below.

<?php
$con = mysqli_connect("localhost", "root", "", "timer") or die("Error Could 
not connect to the database Sir." . mysqli_error($con));

$query = mysqli_query($con, "SELECT * FROM counter WHERE id = 1") or 
die(mysqli_error($con));
$row = mysqli_fetch_array($query)or die(mysqli_error($con));



?>
<div id="form<?php echo $row['id'];?>" style="color:green" class="form-
group">                      
</div>


<Script>
function createCountDown(elementId, date){
console.log(date);
// Set the date we're counting down to
var countDownDate = new Date(date).getTime();
console.log(countDownDate);

// Update the count down every 1 second
var x = setInterval(function(){

// Get todays date and time


var now = new Date().getTime();

// Find the distance between now an the count down date
var distance = (countDownDate) - (now);

//Hint on converting from object to the string.
//var distance = Date.parse(countDownDate) - Date.parse(now);

// Time calculations for days, hours, minutes and seconds
var days = Math.floor(distance / (1000 * 60 * 60 * 24));
//console.log(days);
var hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 *
                                                             60));
var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
var seconds = Math.floor((distance % (1000 * 60)) / 1000);

// Display the result in the element with id="demo"
document.getElementById(elementId).innerHTML = days + "d " + hours + "h "
  + minutes + "m " + seconds + "s ";

// If the count down is finished, write some text
if (distance < 0)
{
  clearInterval(x);
  document.getElementById(elementId).innerHTML = "ORDER EXPIRED";
}
}, 1000);
}
createCountDown("form<?php echo $row['id'];?>", "<?php echo 
$row['time_to_expire'] ;?>")
</Script>

Please check if i am missing something again. thank you for all the replies.

Answer 1

Check carefully ' single quotes here, Use double quotes for first parameter as second param.

createCountDown("form<?php echo $row['id'];?>", "<?php echo $row['time_to_expire'] ;?>")

Here is working example

 function createCountDown(elementId, date) { // Set the date we're counting down to var countDownDate = new Date(date).getTime(); //console.log(countDownDate.getTime()); // Update the count down every 1 second var x = setInterval(function() { // Get todays date and time var now = new Date().getTime(); // Find the distance between now an the count down date var distance = (countDownDate) - (now); //Hint on converting from object to the string. //var distance = Date.parse(countDownDate) - Date.parse(now); // Time calculations for days, hours, minutes and seconds var days = Math.floor(distance / (1000 * 60 * 60 * 24)); var hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60)); var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60)); var seconds = Math.floor((distance % (1000 * 60)) / 1000); // Display the result in the element with id="demo" document.getElementById(elementId).innerHTML = days + "d " + hours + "h " + minutes + "m " + seconds + "s "; // If the count down is finished, write some text if (distance < 0) { clearInterval(x); document.getElementById(elementId).innerHTML = "ORDER EXPIRED"; } }, 1000); } createCountDown('form1', "08-09-2017 12:10:00Z"); createCountDown('form2', "08-09-2018 12:10:00Z"); 

 <div id="form1"></div> <div id="form2"></div> 

Answer 2

EDIT

Internet Explorer and Safari aren't tolerant on malformed dates.

The date passed from PHP to JavaScript Date() : 2017-09-30 00:00:00 was "malformed" . It came from PHP Date("Ymd H:i:s"); which is VERY commonly used...

The fix on JavaScript side is: date = date.replace(" ","T");

It also could be fixed on PHP side with: $date = Date("Ymd\\TH:i:s");
Or if the date comes form a database:

$date = str_replace(" ","T",$row['time_to_expire']);
createCountDown("form<?php echo $row['id'];?>", "<?php $date;?>")

The resulting date string is then 2017-09-30T00:00:00 , which is ISO 8601 compliant.

I'll remember that one. ;)

Answer 3

Use moment.js and try below code for timer

    var eventTime = moment("target time").unix(),
                currentTime = moment().unix(),
                diffTime = eventTime - currentTime,
                duration = moment.duration(diffTime * 1000, "milliseconds"),
                interval = 1000;

            if (diffTime > 0) {
                var timer = setInterval(function () {
                    duration = moment.duration(duration.asMilliseconds() - interval, 'milliseconds');
                    var h = moment.duration(duration).hours(),
                        m = moment.duration(duration).minutes(),
                        s = moment.duration(duration).seconds();

                    // show how many hours, minutes and seconds are left
                    var temp = '<div><span>' + h + '</span> hr </div> <div><span>'
                        + m + '</span> min </div> <div><span>' + s +
                        '</span> sec </div>';
                    $(elementId).html(temp);

                   if ((h == 0 && m == 0 && s == 0) || (s < 0)) {
                      clearInterval(timer);

                }, interval);
            }
       }