strftime


time apg

RETURNS the formated local time or date.


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




<?php

str|false strftime ( 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


 $timestap 


The UNIX timestamp.




* 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.

Since PHP 8.0.0 $timestamp is nullable.


See also: date_default_timezone_set and date_default_timezone_get.

See also: gmstrftime for the time returned by GMT, Greenwich Mean Time



  1 EXERCISE   

<?php

$def_tz_get = date_default_timezone_get();

echo 'Timezone: ' . $def_tz_get . '<br><br>';

$loc_BR = '"pt_BR.utf-8", "pt-BR", "pt_BR"';

setlocale(LC_ALL, "pt_BR.utf-8", "pt-BR", "pt_BR");

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

$fpt_d = strftime($pt_strf, time());

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

echo '<br><br>or avoiding mistakes with ç:<br><br>';

$pt_strf = "%a, %d de %B de %Y %Hh %Mmin %Ss";

$fpt_d = strftime($pt_strf, time());

echo $fpt_d . '<br><br><br>';

$loc_US ='"en_US", "en-US"';

setlocale(LC_ALL, "en_US", "en-US");

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

$fen_d = strftime($en_strf, time());

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

?>

 RESULT   


Locale: "pt_BR.utf-8", "pt-BR", "pt_BR"
ter�a-feira, 27 de abril de 2021 10h 31min 48s

or avoiding mistakes with ç:

ter, 27 de abril de 2021 10h 31min 48s


Locale: "en_US", "en-US"
Tuesday, April/27/2021 10h 31min 48s


These data refer to the instant this exercise was written.


With each new run new values will be displayed


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

$fmpt_u = strftime($mpt_strf, $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_strf = "%A, %B/%d/%Y %Hh %Mmin %Ss";

$fmen_u = strftime($men_strf, $mts);
echo $fmen_u;

?> 

  3 EXERCISE   

<?php

$mts = time();

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

$def_tas_get_now = date_default_timezone_get();

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

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

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

$fmpt_u = strftime($mpt_strf, $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>';

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

$fmen_u = strftime($men_strf, $mts);
echo $fmen_u;

?>