I have this code in comparing dates
var startDate = jQuery("#startDate_field_id").val();
var endDate = jQuery("#endDate_field_id").val();
var startDateSplit = startDate.split("-");
var endDateSplit = endDate.split("-");
var start = new Date();
var end = new Date();
start.setFullYear( startDateSplit[0], startDateSplit[1], startDateSplit[2] );
end.setFullYear( endDateSplit[0], endDateSplit[1], endDateSplit[2] );
if( end < start ) {
alert("End Date should be less than Start Date of the Event");
}
The value of #startDate_field_id is 2011-10-05
white the value of $endDate_field_id is 2011-10-04
What do you think is the reason why this isn't working.
Any help would be greatly appreciated and rewarded.
Thanks! :)
I think your first problem is that you are using the Date object incorrectly. You are passing three arguments to the setFullYear() method, which only takes a single argument, a 4 digit year.
var start = new Date();
var end = new Date();
start.setFullYear( startDateSplit[0], startDateSplit[1], startDateSplit[2] );
end.setFullYear( endDateSplit[0], endDateSplit[1], endDateSplit[2] );
You might want to try something like this:
var start = new Date(startDateSplit[0], startDateSplit[1] - 1, startDateSplit[2])
var end = new Date(endDateSplit[0], endDateSplit[1] - 1, endDateSplit[2]);
I'd use UNIX epoch timestamps for the comparison:
if (end.getTime() > start.getTime()) {
alert('...');
}
Because setFullYear method month parameter accept 0..11, means 9 is October.
why not use
var start = new Date(startDate);
var end = new Date(endDate);
var start = new Date(Number(startDateSplit[0]), Number(startDateSplit[1])-1, Number(startDateSplit[2]));
var end = new Date(Number(endDateSplit[0]), Number(endDateSplit[1])-1, Number(endDateSplit[2]));
or simply:
I am not sure I correctly understand your question .
I guess you want make sure that the end date must be greater than start date.
your code will work fine if you cahnge the if condition .And i just changed the alert message too to get proper meaning
Check this DEMO .
Related
I want to compare date and with date in user timezone after user's login.
I get user's timezone with php.
now How to I take current date/time in javascript of user's timezone current time.
#everyone answered:
I don't need current local system timezone or offset in seconds.
I need users current time with dynamic time I get in php.
For example:
I have 'Asia/Kolkata' or 'America/Denver' or whatever that will be dynamic by php.
Now I can save it to hidden value so that I can get it with Javascript
and than I need current date of this timezone same like Javascript gives date object.
JavaScript uses the system's time zone. You can get the offset via GetTimezoneOffset
<script>
var date=<?php echo date("Y/m/d")?>
</script>
this might help you
Try like this
<script>
var date = '<?php echo date("Y/m/d");?>';
alert(date);
</script>
deeply you can also try like this
var today = new Date();
var localoffset = -(today.getTimezoneOffset()/60);
var destoffset = -4;
var offset = destoffset-localoffset;
var d = new Date( new Date().getTime() + offset * 3600 * 1000);
alert(d);
there you can get
Try this:
// date() function
var currDate = new Date()
var n = currDate.getTimezoneOffset();
You can send UTC string
strtotime("2013-02-08 00:00:00");
After that you would have seconsd, that you can convert simple to JS Date:
var utcString = 1360263600 /*AJAX result must be here*/;
new Date(utcString*1000);
You can use Date Object of JavaScript to get user's local system..
for example you can use following:
var d = new Date();
var time = d.getTime();
alert(time);
this will alert the the number of milliseconds since midnight.
You can send this time to your server and compare the both.
For more functions and details you can visit JavaScript Date Object
I am from Taiwan and it returns "+8" for me.
Working example
JS
function timezone() {
var offset = new Date().getTimezoneOffset();
var minutes = Math.abs(offset);
var hours = Math.floor(minutes / 60);
var prefix = offset < 0 ? "+" : "-";
return prefix+hours;
}
$('#result1').html(timezone());
HTML
<div id="result"></div>
Result
+8
I would recommend to use moment.js with moment timezone.
Then you can do something like:
moment().tz("Asia/Kolkata").format();
At browser,in JS
var today = new Date()
todaySendToServer = today.toString();
I am sending todaySendToServer to server in AJAX call or as part of URL.
At server, in PHP:
$todayJsDateString1 = preg_replace('#^(\d+)/(\d+)/(\d+)\s([\d:]+)\s([a-zA-z]{0,2})$#','$3- $2-$1 $4 $5', $todayJsDateString);
$todayTimestamp = strtotime(todayJsDateString1);
The strtotime() PHP call returns false for date strings returned by some browser(like IE9)
Is there any alternate way to achieve this?
Pass the timestamp instead, so you even don't need to use strtotime in the php side.
var today = new Date();
var ts = today.getTime() / 1000;
It's just a simple typo I guess, you missed a dollar sign:
$todayJsDateString1 = preg_replace('#^(\d+)/(\d+)/(\d+)\s([\d:]+)\s([a-zA-z]{0,2})$#','$3- $2-$1 $4 $5', $todayJsDateString);
$todayTimestamp = strtotime($todayJsDateString1);
Why not send it as a timestamp all the way?
var timestamp = new Date().getTime() / 1000;
$todayTimestamp = $todayJsDateString;
im writing a small calendar based on php and jquery which has the a function to calculate the time difference and display a popup 15 minutes before.
Can some one tell me how can i calculate the time difference in minutes and popup 15 minutes before.
my time is saved as
18-07-2012 15:13:54
jsBin demo
var php = '19-07-2012 03:00:00'.split('-');
var phpDate = php[1]+'/'+php[0]+'/'+php[2];
var phpTime = new Date(phpDate).getTime();
var currTime = new Date().getTime();
var difference= phpTime-currTime;
var leftMin = Math.ceil( difference/(1000*60) );
$('#test').text(leftMin+' MINUTES LEFT!');
Code explanation:
To get the remaining time I've done a millisecond comparison of the php returned time in milliseconds from Jan. 1 1970
and the current time in ms from Jan 1 1970 - subtracting the two values and getting the milliseconds difference. To calculate that difference in minutes I've just done:
var leftMin = Math.ceil( difference/(1000*60) );
The trick was to get the right time format and to revert your (php) returned time to that format too.
The default format looks like: MONTH/DAY/YEAR HOURS:MINUTES:SECONDS
To convert the php returned time '19-07-2012 03:00:00'to that one, I used:
var php = '19-07-2012 03:00:00'.split('-'); // split in array fractions
var phpDate = php[1]+'/'+php[0]+'/'+php[2]; // reposition array keys and add '/'
which returns: 07/19/2012 03:00:00 and now we can compare it to the current time e.g.:
07/19/2012 03:45:21
To retrieve the ms from your converted php time we can use:
var phpTime = new Date(phpDate).getTime(); // get "ms from our string
and for the current time we just take:
var currTime = new Date().getTime(); // get "ms from 1/1/1970
Now having our two milliseconds values we can simply subtract them to get the remaining time:
var difference= phpTime-currTime;
Check PHP's DateTime::diff! Maybe it helps you.
var dateStr = '18-07-2012 15:13:54'//Day-Month-Year
var dateArray = dateStr.split('-')
var d1 = new Date(dateArray[1]+'-'+dateArray[0]+'-'+dateArray[2])
var dateStr2 = '18-07-2012 14:10:54'//Day-Month-Year
var dateArray2 = dateStr2.split('-')
var d2 = new Date(dateArray2[1]+'-'+dateArray2[0]+'-'+dateArray2[2])
var minutes = (d1-d2)/1000/60
-edit; revised code below:-
function timeDiff(date1, date2){
//date format: Day-Month-Year
var dateArray = date1.split('-')
var d1 = new Date(dateArray[1]+'-'+dateArray[0]+'-'+dateArray[2])
var dateArray2 = date2.split('-')
var d2 = new Date(dateArray2[1]+'-'+dateArray2[0]+'-'+dateArray2[2])
var minutes = (d1-d2)/1000/60
return minutes;
}
if(timeDiff('18-07-2012 15:13:54', '18-07-2012 14:59:54')<=15){
alert('popup')
}
php has an mktime() function (http://php.net/manual/en/function.mktime.php) which takes in a hours, minutes, seconds, month, day, year and calculates the seconds since the epoch (in like 1971). Then you can subtract 15*60 use the date() function to go from seconds back to a date format. (http://php.net/manual/en/function.date.php)
I'm not that good at javascript (yet), so I need some help, with an alternative version of this php script (In javascript)
function until($format = ""){
$now = strtotime("now");
$nextTuesday = strtotime("-1 hour next tuesday");
$until = $nextTuesday - $now;
if(empty($format)){
return $until;
}else{
return date("$format",$until);
}
}
Just need it to count down, until next tuesday, in a really short way (Not in 20+ lines, like all the other script I've seen)
It should still return a timestamp, if it's possible (Need it for an offline app)
So if anyone could help me, I would be really happy (Not that I'm not happy right now, but I would be even happier) :D
You may want to take a look at the phpjs site. They have code showing how a substantial number of PHP functions can be done in JS.
Specifically: strtotime and date
JS doesn't have anything remotely close to strtotime. You'd have to determine "next tuesday" yourself. Once you've got that, you can extract a timestamp value using .getTime(), which will be the number of milliseconds since Jan 1/1970. This value can also be fed back into a new date object as a parameter, so you can do date math using simple numbers externally, then create a new date object again using the result.
e.g.
var now = new Date();
var ts = now.getTime();
var next_week = ts + (86400 * 7 * 1000);
next_week_object = new Date(next_week);
Once you've got the "next tuesday" code figured out, the rest is trivial
To get milliseconds till the next tuesday (nearest in the future):
function f_until(){
var now = new Date(Date.now());
var nextT = new Date(Date.now());
var cD = nextT.getDay();
if(cD < 2)nextT.setDate(nextT.getDate() + (2-cD));
else nextT.setDate(nextT.getDate() + (9-cD));
nextT.setHours(nextT.getHours() - 1);
//alert('next tuesday: '+nextT.toString());
return nextT.getTime() - now.getTime();
}
Is it possible through Jquery/Javascript that I can validate a date with the following conditions
example date : 10/10/2011
Conditions : Not in the past (accept
today onwards) Not more than 18 months
(this can be variable)
Because the ways I found out was
var e = new Date();
Alert(e.getMonth() + 2);
but this is not what I wanted
you might want to have a look at date.js
it's a great library for manipulating dates in javascript.
http://www.datejs.com/
here's the documentation:
http://code.google.com/p/datejs/wiki/APIDocumentation
it can also do the comparisons for you!
have a look at Date.compare and Date.addMonths
You can use JQuery's Datepicker, it has validation included and is pretty nice overall.
It can be done like this:
var toValidate = new Date('10/10/2011');
var months = 18;
var now = new Date();
var minDate = new Date(now.getFullYear(), now.getMonth(), now.getDate());
var maxDate = new Date(now.getFullYear(), now.getMonth() + months, now.getDate());
var valid = minDate < toValidate && toValidate < maxDate;