asked on

Need timmer code in java script

I have time value in post like :
$ti=$_POST['ti']

and assume $ti equal to 5 min

i need some code which continuous show decreasing time like:
4.59 min after second 4.58 ........ so on

i have some code but it shows time in seconds and use input field...
please help..

Samuel Liew

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<script type="text/javascript">
//<![CDATA[
var time = null;
window.onload = function() {
	timerDisplay = document.getElementById('timer');
	time = parseFloat(timerDisplay.innerHTML);
	time = isNaN(time)?5:time; // default time
	timerDisplay.innerHTML = time.toFixed(2).replace('.', ':');
	setInterval(countdown, 1000);
}
function countdown() {
	if(time > 0.01) {
		time -= 0.01;
		if(time > 1 && time%1 > 0.59) time = Math.floor(time) + 0.59;
		timerDisplay.innerHTML = time.toFixed(2).replace('.', ':');
	} else timerDisplay.innerHTML = "0:00";
}
//]]>
</script>
</head>

<body>
Time left: <span id="timer"><?= $ti ?></span>
</body>
</html>

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ASKER CERTIFIED SOLUTION

Samuel Liew

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Marco Gasi

I'm sorry, but sam2912's code doesn't work entirely because it not allows to get $ti value. Using window.onload, your script run before $ti value is getted so countdown will start always from 5, the default value. I made a little modification posted in code snippet below.

Hope this helps

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<script type="text/javascript">
//<![CDATA[
var time = null;
function start() {
	timerDisplay = document.getElementById('timer');
	time = parseFloat(timerDisplay.innerHTML);
//	time = isNaN(time)?5:time; // default time // commented because not useful
	timerDisplay.innerHTML = time.toFixed(2).replace('.', ':');
	setInterval(countdown, 1000);
}
function countdown() {
	if(time > 0.01) {
		time -= 0.01;
		if(time%1 > 0.59) time = Math.floor(time) + 0.59;
		timerDisplay.innerHTML = time.toFixed(2).replace('.', ':');
	} else timerDisplay.innerHTML = "0:00";
}
//]]>
</script>
</head>

<body>
<?php
    if (isset($_REQUEST['ti'])){
        $ti = $_REQUEST['ti'];
    }else{
        $ti = 5;
    }
    echo "Time left: <span id='timer'>$ti</span>";
?>
    
<?php
echo "<br><br>INSOMMA $ti<BR>";
    echo "<script type='text/javascript'>start();</script>";
?>
</body>
</html>

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Marco Gasi

Someone can tell me why in my test the sam2912's script didn't get $ti value and always countdfown started from 5?
This only because I would understand where is my error, if one error I made... Thanks

Samuel Liew

<?= $ti ?> is a PHP variable printed into the span. It should be a positive number. Otherwise, the code will not be able to parse the value, and will take 5 as the default.

Marco Gasi

Thank,sam. But I wrote:

<?php
if (isset($_REQUEST['ti'])){
$ti = $_REQUEST['ti'];
}
?>

leaving your code untouched. Then, if I typed http://localhost/countdown.php?ti=10 countdown didn't start from 10 but from 5. This is what I don't understand. I post the entire code I tried: it doesn't work. Bye

<?php
    if (isset($_REQUEST['ti'])){
      $ti = $_REQUEST['ti'];
    
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<script type="text/javascript">
//<![CDATA[
var time = null;
window.onload = function() {
	timerDisplay = document.getElementById('timer');
	time = parseFloat(timerDisplay.innerHTML);
	time = isNaN(time)?5:time; // default time
	timerDisplay.innerHTML = time.toFixed(2).replace('.', ':');
	setInterval(countdown, 1000);
}
function countdown() {
	if(time > 0.01) {
		time -= 0.01;
		if(time%1 > 0.59) time = Math.floor(time) + 0.59;
		timerDisplay.innerHTML = time.toFixed(2).replace('.', ':');
	} else timerDisplay.innerHTML = "0:00";
}
//]]>
</script>
</head>

<body>
Time left: <span id="timer"><?= $ti ?></span>
</body>
</html>

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savsoft

ASKER

I have added <?php $ti;?>

in line no 17 of sam2912

time = isNaN(time)?<?php $ti;?>:time; // default time

Samuel Liew

in that case you can remove these two lines of code:

time = parseFloat(timerDisplay.innerHTML);
time = isNaN(time)?5:time; // default time

and replace with

time = <?= php $ti; ?>;

Marco Gasi

Thank savsoft: this makes clear all things for me.

savsoft

ASKER

i have some problem.

i want to send time at any instant by click on form submit button.

some thing like this:

<input type="hidden" name="instant_time" value="<span id="timer"><?= $ti ?></span>">

please help me...

Marco Gasi

Honestly you should open a new question: two months are past from the closing this question, the problem is not the same (it's only related to the original one) and here you can't give points for new solution.

However, you can try this:

<input type="hidden" name="instant_time" value="<span id="timer"><?php= $ti ?></span>">

try

<input type="hidden" name="instant_time" value="<?php= $ti ?>">

Cheers

savsofts

it doesn't work for less then 8 minutes