How to find day of week in php in a specific timezone

Question

I am confused while using php to handle date time   What I am trying to do is this  When a user visits my page I am asking his timezone and then displaying the  day of week  in his timezone   I don t want to use the browser s day  I want to do this calculation in php   This is how I am trying to achieve it    The timezone entered by user Unix time stamp  calculated by php time   function    But I dont know how to proceed    How would i get the  day of week  in this timezone

User · Answer

Standard letter-based representations of date parts are great, except the fact they're not so intuitive. The much more convenient way is to identify basic abstractions and a number of specific implementations. Besides, with this approach, you can benefir from autocompletion.

Since we're talking about datetimes here, it seems plausible that the basic abstraction is ISO8601DateTime. One of the specific implementations is current datetime, the one you need when a makes a request to your backend, hence Now() class. Second one which is of some use for you is a datetime adjusted to some timezone. Not surprisingly, it's called AdjustedAccordingToTimeZone. And finally, you need a day of the week in a passed datetime's timezone: there is a LocalDayOfWeek class for that. So the code looks like the following:

(new LocalDayOfWeek(
    new AdjustedAccordingToTimeZone(
        new Now(),
        new TimeZoneFromString($_POST['timezone'])
    )
))
    ->value();

For more about this approach, take a look here.

User · Answer

If you can get their timezone offset  you can just add it to the current timestamp and then use the gmdate function to get their local time      let s say they re in the timezone GMT 10  theirOffset   10        GET  offset   perhaps   offsetSeconds    theirOffset   3600  echo gmdate  l   time      offsetSeconds

User · Answer

myTimezone   date default timezone get    date default timezone set  userTimezone    userDay   date  l    userTimestamp   date default timezone set  myTimezone     This should work  didn t test it  so YMMV   It works by storing the script s current timezone  changing it to the one specified by the user  getting the day of the week from the date   function at the specified timestamp  and then setting the script s timezone back to what it was to begin with   You might have some adventures with timezone identifiers  though

User · Answer

Day of Week  is actually something you can get directly from the php date   function with the format  l  or  N  respectively  Have a look at  the manual  edit  Sorry I didn t read the posts of Kalium properly  he already explained that  My bad

User · Answer

Thanks a lot guys for your quick comments   This is what i will be using now  Posting the function here so that somebody may use it   public function getDayOfWeek  pTimezone          userDateTimeZone   new DateTimeZone  pTimezone        UserDateTime   new DateTime  now    userDateTimeZone         offsetSeconds    UserDateTime- gt getOffset           echo  offsetSeconds       return gmdate  l   time      offsetSeconds        Report if you find any corrections

User · Answer

I think this is the correct answer  just change Europe Stockholm to the users time-zone    dateTime   new  DateTime       now       new  DateTimeZone  Europe Stockholm       day    dateTime- gt format  N         ISO-8601 numeric representation of the day of the week  added in PHP 5 1 0    1  for Monday  through 7  for Sunday    http   php net manual en function date php  For a list of supported time-zones  see http   php net manual en timezones php

User · Answer

Another quick way   date default timezone set  userTimezone   echo date  l

User · Answer

Based on one of the other solutions with a flag to switch between weeks starting on Sunday or Monday  function getWeekForDate  date   weekStartSunday   false         timestamp   strtotime  date           Week starts on Sunday     if  weekStartSunday            start    date  D    timestamp      Sun     date  Y-m-d    timestamp    date  Y-m-d   strtotime  Last Sunday    timestamp             end    date  D    timestamp      Sat     date  Y-m-d    timestamp    date  Y-m-d   strtotime  Next Saturday    timestamp          else      Week starts on Monday          start    date  D    timestamp      Mon     date  Y-m-d    timestamp    date  Y-m-d   strtotime  Last Monday    timestamp             end    date  D    timestamp      Sun     date  Y-m-d    timestamp    date  Y-m-d   strtotime  Next Sunday    timestamp               return array  start    gt   start   end    gt   end

User · Answer

Check date is monday or sunday before get last monday or last sunday    public function getWeek  date        date stamp   strtotime date  Y-m-d   strtotime  date             check date is sunday or monday      stamp   date  l    date stamp              timestamp   strtotime  date         start week     if date  D    timestamp      Mon                         week start    date       else           week start   date  Y-m-d   strtotime  Last Monday    date stamp                end week     if  stamp     Sunday             week end    date       else           week end   date  Y-m-d   strtotime  Next Sunday    date stamp                      return array  week start   week end

User · Answer

My solution is this    tempDate    2012-07-10   echo date  l   strtotime   tempDate      Output is  Tuesday   tempDate    2012-07-10   echo date  D   strtotime   tempDate      Output is  Tue

User · Answer

dw   date   w    timestamp     Where  dw will be 0  for Sunday  through 6  for Saturday  as you can see here  http   www php net manual en function date php

User · Answer

echo date  l   strtotime  today

[php] How to find day of week in php in a specific timezone

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