How to convert server time to local time in Laravel? - php

I would like to print the time in local time in Laravel. If the user create a post it will display the created time on the server. How can I display it in local time ?
In my blade file I used this code to display created time,
{{{ $posts->updated_at }}}
Which displays the time in database, which is a server time. How can I convert it to users local time ?

I found a solution to convert time to local time by using session. The current time zone offset will store on session to calculate users time. Create a jquery post function to post users timezone offset to session. This is my code,
default.blade.php
#if($current_time_zone=Session::get('current_time_zone'))#endif
<input type="hidden" id="hd_current_time_zone" value="{{{$current_time_zone}}}">
// For assigning session value to hidden field.
<script type="text/javascript">
$(document).ready(function(){
if($('#hd_current_time_zone').val() ==""){ // Check for hidden field is empty. if is it empty only execute the post function
var current_date = new Date();
curent_zone = -current_date.getTimezoneOffset() * 60;
var token = "{{csrf_token()}}";
$.ajax({
method: "POST",
url: "{{URL::to('ajax/set_current_time_zone/')}}",
data: { '_token':token, curent_zone: curent_zone }
}).done(function( data ){
});
}
});
routes.php
Route::post('ajax/set_current_time_zone', array('as' => 'ajaxsetcurrenttimezone','uses' => 'HomeController#setCurrentTimeZone'));
HomeController.php
public function setCurrentTimeZone(){ //To set the current timezone offset in session
$input = Input::all();
if(!empty($input)){
$current_time_zone = Input::get('curent_zone');
Session::put('current_time_zone', $current_time_zone);
}
}
Helpers/helper.php
function niceShort($attr) {
if(Session::has('current_time_zone')){
$current_time_zone = Session::get('current_time_zone');
$utc = strtotime($attr)-date('Z'); // Convert the time zone to GMT 0. If the server time is what ever no problem.
$attr = $utc+$current_time_zone; // Convert the time to local time
$attr = date("Y-m-d H:i:s", $attr);
}
return attr;
}
index.blade.php
{{ niceShort($posts->updated_at) }}
Now we can print the time in clients time zone. The time zone setting code run only when the session empty.

You can do this by using javascript. Use following libraries:
moment.min.js (http://momentjs.com/downloads/moment.js)
moment-timezone-with-data.js ()
jstz.min.js (https://bitbucket.org/pellepim/jstimezonedetect)
Here is the code :
var update_at = '<?php echo $posts->updated_at;?>'; //set js variable for updated_at
var serverTimezone = 'YOUR SERVER TIME ZONE'; //set js variable for server timezone
var momentJsTimeObj = moment.tz(update_at, serverTimezone); //create moment js time object for server time
var localTimeZone = jstz.determine(); //this will fetch user's timezone
var localTime = momentJsTimeObj.clone().tz(localTimeZone.name()).format(); //convert server time to local time of user
Now you can display local time through js

Try this method, I think this is what you want:
$localTime = $object->created_at->timezone($this->auth->user()->timezone);
Here, $this->auth->user()->timezone will return current user's timezone, and timezone() will convert created_at to to user's local time.
If you want to get all visitors timezone (not just logged in users), you can you package for Laravel similar to laravel-geoip. It will generate $visitor['timezone'] for you which you can use like this:
$localTime = $object->created_at->timezone($visitor['timezone']);

Best option is to do this with Javascript, get client's timezone and then convert server time to cleint's accordingly.
Please refer https://stackoverflow.com/a/1837243/4007628

Try this:
$dt = new DateTime($posts->updated_at);
$tz = new DateTimeZone('Asia/Kolkata'); // or whatever zone you're after
$dt->setTimezone($tz);
echo $dt->format('Y-m-d H:i:s');

Go to app.php page in Config folder and change this
'timezone' => 'UTC',
to
'timezone' => 'addYourTimeZoneHere',
reference
https://laravel.com/docs/5.5/configuration
find your timezone
http://php.net/manual/en/timezones.php

Server time should stick with UTC timezone
In front end, you can use moment.js to render the correct local timezone. I tested this in moment version 2.22.2.
Simply add Z to the datetime value and moment will render the date to user's local time zone
moment(dateTimeValue + ' Z');

Comment the timezone settings in app.php page
//'timezone' => 'UTC',

Related

How do I find user timezone in php?

How can I dynamically find user timezone in config.php file in codeigniter?
date_default_timezone_set('Asia/Kolkata');
You must either use javascript (for example http://momentjs.com/timezone/) or then you must use the geoip to determine it in the backend side (CURL the client ip to http://freegeoip.net/?q=IP_ADDR). Also if you have multiple TLDs (for example .com, .se etc.) you can use those if nothing else works. Of course you should allow the user to change the timezone from user interface in case the automatic way fails for some reason.
Using Javascript you can get the user timezone:
<script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/jquery/2.0.0/jquery.min.js">
</script>
<script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/jstimezonedetect/1.0.4/jstz.min.js">
</script>
<script type="text/javascript">
$(document).ready(function(){
var tz = jstz.determine(); // Determines the time zone of the browser client
var timezone = tz.name(); //'Asia/Kolhata' for Indian Time.
document.getElementById("hiddenVal").value = timezone;
</script>
After getting timezone in javascript you can use that value in php code.
In HTML make an hidden element with name and id as "hiddenval" and get value from that element on form submit like
<?hpp
echo$usertime_zone = $_REQUEST['hiddenval'];
?>
In case if you only want to use PHP then utilize the following code:
<?php
$ip = $_SERVER['REMOTE_ADDR']; // means we got user's IP address
$json = file_get_contents( 'http://smart-ip.net/geoip-json/' . $ip); // this one service we gonna use to obtain timezone by IP
// maybe it's good to add some checks (if/else you've got an answer and if json could be decoded, etc.)
$ipData = json_decode( $json, true);
if ($ipData['timezone']) {
$tz = new DateTimeZone( $ipData['timezone']);
$now = new DateTime( 'now', $tz); // DateTime object corellated to user's timezone
} else {
// we can't determine a timezone - do something else...
}
<?php
session_start();
$timezone = $_SESSION['time'];
?>
This will read the session variable "time", which we are now about to create.
On the same page, in the <head> section, first of all you need to include jQuery:
<script type="text/javascript" src="http://code.jquery.com/jquery-latest.min.js"></script>
Also in the <head> section, paste this jQuery:
<script type="text/javascript">
$(document).ready(function() {
if("<?php echo $timezone; ?>".length==0){
var visitortime = new Date();
var visitortimezone = "GMT " + -visitortime.getTimezoneOffset()/60;
$.ajax({
type: "GET",
url: "http://domain.com/timezone.php",
data: 'time='+ visitortimezone,
success: function(){
location.reload();
}
});
}
});
</script>
You may or may not have noticed, but you need to change the url to your actual domain.
One last thing. You are probably wondering what the heck timezone.php is. Well, it is simply this: (create a new file called timezone.php and point to it with the above url)
<?php
session_start();
$_SESSION['time'] = $_GET['time'];
?>
If this works correctly, it will first load the page, execute the JavaScript, and reload the page. You will then be able to read the $timezone variable and use it to your pleasure! It returns the current UTC/GMT time zone offset (GMT -7) or whatever timezone you are in.

jquery countdown changes when user change its system time

i'm using jquery countdown with php. i have given an end date which is going to the countdown. my problem is lets suppose 1 hour left is showing in countdown but when a user change its system time the countdown changes. like if a user back his time 1 hour then the counter will display the 2 hours left. is there any way to get the server time for more accurate time not the user system time. please help.
how can i get server time not user system time?
below is my jquery code
if($(pluginsArray[6]).length){
$(pluginsArray[6]).each(function(){
var $this = $(this),
dateObj = $this.data();
var finalDate = new Date(dateObj.year, dateObj.month, dateObj.day, dateObj.hours, dateObj.minutes);
$this.countdown({
timezone: +4,
until : finalDate,
expiryText: '<div class="over">Closed.</div>',
onExpiry : function(){
setTimeout(function( ) { location.reload(); }, 5000);
},
format :'DHMS',
layout : '<b>{dn}</b> <span class="fs_medium d_inline_b m_right_5">days</span> <b>{hn}</b> <span class="fs_medium d_inline_b m_right_5">hrs</span> <b>{mn}</b> <span class="fs_medium d_inline_b m_right_5">min</span> <b>{sn}</b> <span class="fs_medium">sec</span>'
});
});
}
and here is what i did in php
<div class="countdown color_redc d_inline_m fs_large second_font lh_small f_xs_20" style="font-size:26px;" data-year="<?= $aDate[0] ?>" data-month="<?= ($aDate[1] - 1) ?>" data-day="<?= $aDate[2] ?>" data-hours="<?= $aDate[3] ?>" data-minutes="<?= $aDate[4] ?>"></div>
Solution without PHP
What you can do, without coding any server side is using a public API to get current time.
Found a similar topic on StackoverFlow : Free Rest API to get current time as string (timezone irrelevant)
TimezoneDb provides a free API: http://timezonedb.com/api
GenoNames also has a RESTful API available to get the current time for
a given location: http://www.geonames.org/export/ws-overview.html.
You can use Greenwich, UK if you'd like GMT.
GenoNames looks to be US only, TimezoneDb works you just need to register for a free public key.
Few people recommend timeapi.org but looks like they do not accept CROSS-DOMAIN request in Ajax, and the exemple they provide is no longer available.
Solution with PHP and jQuery Countdown configuration
Also you can ask jQuery CountDown to synchronyze with your server using serverSync option
$(selector).countdown({
until:liftoffTime, serverSync: serverTime});
function serverTime() {
var time = null;
$.ajax({url: 'http://myserver.com/serverTime.php',
async: false, dataType: 'text',
success: function(text) {
time = new Date(text);
}, error: function(http, message, exc) {
time = new Date();
}});
return time;
}
PHP file : serverTime.php
<?php
$now = new DateTime();
echo $now->format("M j, Y H:i:s O")."\n";
?>
BUT
Keep in mind your user will always be able to change your code and fake it ... so if you need to implement some security this is not enough and you will need to code some backend stuff.

show and hide based on server date and time

So here's what I'm trying to do - I have the following code:
<div id="on">
<p>We are: <span class="onair">ON AIR</span></p>
</div>
<div id="off">
<p>We are: <span class="offair">OFF AIR</span></p>
</div>
And what I'd like to do is "show" the "on" div on Tuesday's from 3pm to 4pm (server time), while simultaneously hiding the "off" div - and then switch that around for every other date/time.
?
If you use PHP you can do logic statements on the server-side to render the exact information you need instead of calculating it later on the client side.
(Client side solutions work too if you dont care about where the time is coming from)
(1) You can have the server render javascript for you that you can use in a script
//if you want the server's time you can do this:
<?php $timestamp = time(); ?>
//render variables in javascript instead of html
<?php
echo <<<EOD
<script>
var timestamp = ${timestamp}
//then later in your javascript process the timestamp logic to update the dom
</script>
EOD;
?>
(2) You can also have the server render a className in the body tag based on whether or not a condition is true or false. (This is my preferred method usually)
//onAirClass( min, max, timestamp ) returns className
//this function returns onair or offair class if the timestamp is in range
function onAirClass( timeMin, timeMax, timestamp ){
if( timestamp >= timeMin && timestamp <= timeMax ){
return 'onair';
}
return 'offair'
}
//using onAirClass( min, max, timestamp )
<?php $bodyClass = $bodyClass . ' ' . onAirClass( $timestamp ); ?>
<?php echo "<body class='${bodyClass}'>"; ?>
then in your styles you can have the elements you want to hide or show based on class inheritance from the body tag.
Check out the PHP time function to create new time strings, and do time calculations for your onAirClass() function
How to check the time between a given time range
UPDATED
Corrected PHP syntax errors
#maerics solution is OK, depending on what you want to do, just don't EVER do anything like this:
var timestamp = $('#server-timestamp').text();
Ultimately, there are many ways to do the same thing, but some things are more 'right' than others.
There are reasons to do some calculations on the client side vs the server side, and vice versa. As a newbie developer, just make sure that whatever method you use:
is simple
is efficient (doesnt do anything unnecessary or redundant)
falls in line with best practices
Actually this can be accomplished using just JavaScript without any server-side code, by using your timezone offset.
Here's a function you can use:
var onAir = function (day, start, end, timezone) {
var local, utc, show, days, onAir, startValues, endValues, startTime, endTime, startMinutes, endMinutes, showMinutes;
// by default, we are not on air
onAir = false;
// map day numbers to indexes
days = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Firday', 'Saturday'];
// convert start/end times to date objects
startValues = start.split(':');
endValues = end.split(':');
startTime = new Date();
endTime = new Date();
startTime.setHours(startValues[0], startValues[1]);
endTime.setHours(endValues[0], endValues[1]);
// add the hours minutes together to get total minutes
startMinutes = (startTime.getHours() * 60) + startTime.getMinutes();
endMinutes = (endTime.getHours() * 60) + endTime.getMinutes();
// get the current local time
local = new Date();
// get the current time in the show's timezone
utc = local.getTime() + (local.getTimezoneOffset() * 60000);
show = new Date(utc + (3600000*timezone));
// convert the show hours + minutes to just minutes
showMinutes = (show.getHours() * 60) + show.getMinutes();
// test to see if the show is going on right now
if (days[show.getDay()] === day && (showMinutes >= startMinutes && showMinutes <= endMinutes)) {
onAir = true;
}
return onAir;
}
// example: Air time is Tuesday between 1-2pm Central Time (-6)
var texasShowOnAir = onAir('Tuesday', '13:00', '14:00', '-6'));
// now check if we are on air
if (texasShowOnAir) {
// do stuff here...
}
You can now use this function like this:
var check = onAir('DAY', 'STARTTIME', 'ENDTIME', 'YOURTIMEZONE');
This will return a true/false. Be sure and use 24 hour format.
I would even argue that this is better than using your server's timestamp, because often (especially if you have shared hosting), your server can be set in a different timezone than you.
Here's a demo fiddle: http://jsfiddle.net/stevenschobert/mv54B/
Have the server provide a timestamp when it generates the page and have the client also generate a timestamp when it loads the page so that you can calculate the time offset between the two systems.
Then you can call a function on some interval that checks the current server time to see if it is within the 3pm-4pm period and show/hide the target elements as needed.
From the server:
<div id="server-timestamp" style="display:none">2013-02-12T18:01:19Z</div>
On the client:
$(document).on('load', function() {
var serverTime = new Date($('#server-timestamp').text())
, clientTime = new Date()
, offsetMilliseconds = (clientTime - serverTime);
setInterval(function() {
// If server time is 3pm-4pm then hide/show divs...
}, 1000 /* every second */);
});

PHP JS Transform date to user timezone

I have a page that shows future events along with the date (server time).
I need some method to display the date in user time.
Example:
Oct, 26 13:48:23 (server)
Oct, 26 14:48:23 (user time (UTC +1)) -> event info
What I have so far:
<?php
$sql=mysql_query("SELECT * FROM table") or die("Come back later");
while($row=mysql_fetch_array($sql)) {
echo date('M, d H:i:s', strtotime ($row['date'])).' -> '.$row['info'];
}
?>
With the diffence I want to detect user timezone.
Thank you.
EDIT
I know I should not be using mysql_*
If you're ok with doing the conversion to the user's time zone in JavaScript, you could do the following:
PHP
<?php
$sql=mysql_query("SELECT * FROM table") or die("Come back later");
while($row=mysql_fetch_array($sql)) {
echo '<span class="date">' . date('M, d H:i:s', strtotime ($row['date'])) . ' UTC</span> -> '.$row['info'];
}
?>
JavaScript (With jQuery for Readability)
$(function(){
$('.date').each(function(){
var $this = $(this);
// Parse the date string (the format you've given will
// work, and the added UTC above will give JavaScript
// some context)
var dateVal = new Date($this.text());
// JavaScript will convert it to the user's timezone when
// stringifying it (helped by the server timezone specified
// in the PHP.
$this.text(dateVal.toString());
});
});
If you want to render the dates in the format: Oct, 26 13:48:23, you could do this:
var dateString = dateVal.toLocaleString();
var parts = /^\w+ (\w+ \d{1,2}) \d{4} (\d{2}:\d{2}:\d{2})/.exec(dateString);
dateString = parts[1] + ' ' + parts[2];
Then use $this.text(dateString); to inject it into the dom.
You need to create DateTime object from this date, and then apply DateTimeZone to that object.
You would need to get the timezone from the user.
You can accomplish this by offering a dropdown with timezones that the user can select and submit. To make this a little more user friendly you could use some of the geoip functions to detect country and region and then determine a default timezone for the user. Do keep in my that location by IP is not 100% accurate but is instead an educated guess as to where the user may be located.
Alternatively you can use ajax to send the timezone to the server and then update accordingly.

JQuery and PHP Date difference

I am using a jquery date picker and also setting a date through php date('Y-m-D') functions. Both of them give different date for today. Jquery picker fills the field with the date that is one day ahead of php date(). Here is the function for jquery. I need jquery to show same date for today as php.
<script type="text/javascript" charset="utf-8">
var $j = jQuery.noConflict();
$j(function()
{
// initialise the "Select date" link
$j('#date-pick')
.datePicker(
// associate the link with a date picker
{
createButton:false,
startDate: '01/01/1970',
endDate: (new Date()).asString()
//endDate:<?php echo date('y-m-d'); ?>
}
).bind(
// when the link is clicked display the date picker
'click',
function()
{
updateSelects($j(this).dpGetSelected()[0]);
$j(this).dpDisplay();
return false;
}
).bind(
// when a date is selected update the SELECTs
'dateSelected',
function(e, selectedDate, $td, state)
{
updateSelects(selectedDate);
}
).bind(
'dpClosed',
function(e, selected)
{
updateSelects(selected[0]);
}
).val(new Date().asString()).trigger('change');
var updateSelects = function (selectedDate)
{
var selectedDate = new Date(selectedDate);
if(selectedDate != "Invalid Date")
{
$j('#d').val(selectedDate.getDate());
$j('#m').val(selectedDate.getMonth()+1);
$j('#y').val(selectedDate.getFullYear());
}
}
// listen for when the selects are changed and update the picker
// default the position of the selects to today
var today = new Date();
updateSelects(today.getTime());
});
</script>
jQuery uses the client computer's date while php uses the server's date. They're basically different if you haven't set the default timezone in php. Take a look at this:
http://php.net/manual/en/function.date-default-timezone-set.php
You can set the default timezone in php.ini file located on the PHP main directory (Eg. PHP5.4)
As for the using of the server's date in the datepicker:
A quick google search lead me to this: how to display server side dates in jquery datepicker?
basically what they have done is creating a new date based on the current timestamp:
$timestamp = strtotime("2012-08-02");
minDate: new Date('<?php echo $timestamp; ?>');
DO NOT TRUST THE CLIENTS DATE AND TIME
These values can be altered at a whim.
Just use them on advisement.
Besides Javascript is there to enhance the users experience (i.e. make it more interactive). But at the end of the day you will have to pick up the pieces it you do not validate and verify the data you get from the client

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