gmstrftime


php apg

RETURNS the formated local time or date related to GMT, Greenwich Mean Time.


May experience difficulties in displaying characters outside of the English language when preceded with the setlocale function.




<?php

str|false gmstrftime ( str $format , int|null $timestamp = null )


Where,

$format = The format of outpitted date 
                 (SEE the below TABLE) 
                 In addition, some constants may be used,  
                 which have recurring values 
                 (SEE the below TABLE) 

$timestamp = The UNIX timestamp: 
                      The current local time, if not given. 
                      In other words it uses the default provided  
                      by the time function.  

?>

 $format 

RECOGNIZED CHARACTERS
format Description Example returned values
Day
%a An abbreviated textual representation of the day Sun through Sat
%A A full textual representation of the day Sunday through Saturday
%d Two-digit day of the month (with leading zeros) 01 to 31
%e Day of the month, with a space preceding single digits.
Not implemented as described on Windows.
* See below for more information.		 1 to 31
%j Day of the year, 3 digits with leading zeros 001 to 366
%u ISO-8601 numeric representation of the day of the week 1 => Monday
through
7 => Sunday
%w Numeric representation of the day of the week 0 => Sunday
through
6 => Saturday
Week
%U Week number of the given year, starting with the first Sunday as the first week 42
(the 42nd full week of the year)
%V ISO-8601:1988 week number of the given year,
starting with the first week of the year with at least 4 weekdays,
with Monday being the start of the week		 01 through 53
(where 53 accounts for an overlapping week)
%W A numeric representation of the week of the year, starting with the first Monday as the first week 46
(for the 46th week of the year beginning with a Monday)
Month
%b Abbreviated month name, based on the locale Jan through Dec
%B Full month name, based on the locale January through December
%h Abbreviated month name, based on the locale
(an alias of %b)		 Jan through Dec
%m Two digit representation of the month 01 through 12
Year
%C Two digit representation of the century
(year divided by 100, truncated to an integer)		 19 for the 20th Century
%g Two digit representation of the year going by
ISO-8601:1988 standards
(see %V)		 09 for the week of January 6, 2009
%G The full four-digit version of %g 2008 for the week of January 3, 2009
%y Two digit representation for the year 99 or 18
%Y Four digit representation for the year 1999 or 2018
Time
%H Two digit representation of the hour in 24-hour format 00 through 23
%k Hour in 24-hour format, with a space preceding single digits 0 through 23
%I Two digit representation of the hour in 12-hour format 01 through 12
%l Hour in 12-hour format, with a space preceding single digits 1 through 12
%M Two digit representation of the minute 00 through 59
%p UPPER-CASE 'AM' or 'PM' based on the given time AM for 00:31, PM for 22:23
%P lower-case 'am' or 'pm' based on the given time am for 00:31, pm for 22:23
%r Same as "%I:%M:%S %p" 09:34:17 PM for 21:34:17
%R Same as "%H:%M" 00:35 for 12:35 AM, 16:44 for 4:44 PM
%S Two digit representation of the second 00 through 59
%T Same as "%H:%M:%S" 21:34:17 for 09:34:17 PM
%X Preferred time representation based on locale, without the date 03:59:16 or 15:59:16
%z The time zone offset.
Not implemented as described on Windows.
See below for more information.		 -0500 for US Eastern Time
%Z The time zone abbreviation.
Not implemented as described on Windows.
See below for more information.		 EST for Eastern Time
Time and Date Stamps
%c Preferred date and time stamp based on locale Tue Feb 5 00:45:10 2009 for February 5, 2009 at 12:45:10 AM
%D Same as "%m/%d/%y" 02/05/09 for February 5, 2009
%F Same as "%Y-%m-%d"
(commonly used in database datestamps)		 2009-02-05 for February 5, 2009
%s Unix Epoch Time timestamp
(same as the time function)		 305815200 for September 10, 1979 08:40:00 AM
%x Preferred date representation based on locale, without the time 02/05/09 for February 5, 2009
Miscellaneous
%n A newline character ("\n")
%t A Tab character ("\t")
%% A literal percentage character ("%")
ed48

* The maximun lenght for the $format is 1023 characters.

Contrary to ISO-8601:1988, Sun Solaris starts with Sunday as 1.
As a result, %u may not function as described in this manual.

* The %e modifier is not supported in the Windows™ implementation of this function.
To achieve this value, the %#d modifier can be used instead.
The example below illustrates how to write a cross platform compatible function.
The %z and %Z modifiers both return the time zone name instead of the offset or abbreviation.

* The %P modifier is not supported in the macOS implementation of this function.



 $timestamp 


The related UNIX timestamp.





This function behaves the same as  strftime  except that the time returned is GMT, Greenwich Mean Time.

Since PHP 8.0.0 $timestamp is nullable.



  1 EXERCISE   

<?php

$def_tz_get = date_default_timezone_get();

echo $def_tz_get . '<br><br><br>';

$loc_BR = '"pt_BR.utf-8", "portuguese-brazil", "ptb"';

setlocale(LC_ALL, "pt_BR.utf-8", "portuguese-brazil", "ptb");

$pt_gmstrf = "%A, %d de %B de %Y %Hh %Mmin %Ss";

$fgmpt_d = gmstrftime($pt_gmstrf, time());

echo 'Locale: ' . $loc_BR . '<br>' .$fgmpt_d . '<br><br><br><br>';

$loc_US ='"en_US", "american", "american english", "american-english", "english-american", "english-us", "english-usa", "enu", "us", "usa"';

setlocale(LC_ALL, "en_US", "american", "american english", "american-english", "english-american", "english-us", "english-usa", "enu", "us", "usa");

$en_gmstrf = "%A, %B/%d/%Y %Hh %Mmin %Ss";

$fgmen_d = gmstrftime($en_gmstrf, time());

echo 'Locale: ' . $loc_US . '<br>' . $fgmen_d;

/* - - - - - - - - - - - - - - - - - - - - - - - - - - - -
   PLEASE NOTE THAT no matter the timezone,
   dates will always be considered in relation to GMT
   
   May experience difficulties in displaying characters 
   outside of the English language
   - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ 

?>


  2 EXERCISE   

<?php

/* - - - - - - - - - - - - - - - - -
   Final UNIX ERA for 32 bit
   - - - - - - - - - - - - - - - - - */

$mts = 2147483647; 
// This is the maximum integer value in 32bit register.

$tz_as_set = date_default_timezone_set('America/Chicago');

$def_tas_get_now = date_default_timezone_get();

echo $def_tas_get_now . '<br><br><br>';

setlocale(LC_ALL, "pt_BR.utf-8", "portuguese-brazil", "ptb");

$mpt_gmstrf = "%A, %d de %B de %Y %Hh %Mmin %Ss";

$fmpt_u = gmstrftime($mpt_gmstrf, $mts);

echo $fmpt_u . '<br><br><br><br>';

$tz_utc_set = date_default_timezone_set('UTC');

$def_tutc_get_now = date_default_timezone_get();

echo $def_tutc_get_now . '<br><br><br>';

setlocale(LC_ALL, "en_US", "american", "american english", "american-english", "english-american", "english-us", "english-usa", "enu", "us", "usa");

$men_gmstrf = "%A, %B/%d/%Y %Hh %Mmin %Ss";

$fmen_u = gmstrftime($men_gmstrf, $mts);
echo $fmen_u;

/* - - - - - - - - - - - - - - - - - - - - - - - - - - - -
   PLEASE NOTE THAT no matter the timezone,
   dates will always be considered in relation to GMT
   
   May experience difficulties in displaying characters 
   outside of the English language
   - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
   
?>