STRFTIME(3)								 1							       STRFTIME(3)

strftime - Format a local time/date according to locale settings

SYNOPSIS

       string strftime (string	$format, [int  $timestamp = time()])

DESCRIPTION

	Format the time and/or date according to locale settings. Month and weekday names and other language-dependent strings respect the current
       locale set with setlocale(3).

	Not all conversion specifiers may be supported by your C library, in which case they will not be supported by PHP's strftime(3). Addition-
       ally,  not  all platforms support negative timestamps, so your date range may be limited to no earlier than the Unix epoch. This means that
       %e, %T, %R and, %D (and possibly others) - as well as dates prior to Jan 1, 1970 - will not work on Windows, some Linux distributions,  and
       a few other operating systems. For Windows systems, a complete overview of supported conversion specifiers can be found at MSDN.

PARAMETERS

	      o $format
		-

	      The following characters are recognized in the $format parameter string

	      +---------------------+--------------------------------------+---+
	      |      $format	    |					   |   |
	      | 		    |					   |   |
	      | 		    |		  Description		   |   |
	      | 		    |					   |   |
	      | 		    |	    Example returned values	   |   |
	      | 		    |					   |   |
	      +---------------------+--------------------------------------+---+
	      | 		    |					   |   |
	      |        Day	    |					   |   |
	      | 		    |					   |   |
	      | 		    |		      ---		   |   |
	      | 		    |					   |   |
	      | 		    |		      ---		   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%a	    |					   |   |
	      | 		    |					   |   |
	      | 		    | An  abbreviated  textual representa- |   |
	      | 		    | tion 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 pre- |   |
	      | 		    | ceding  single  digits.  Not  imple- |   |
	      | 		    | mented as described on Windows.  See |   |
	      | 		    | below for more information.	   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 		    |		     1 to 31		   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%j	    |					   |   |
	      | 		    |					   |   |
	      | 		    | Day of the year, 3 digits with lead- |   |
	      | 		    | ing zeros 			   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 		    |		   001 to 366		   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%u	    |					   |   |
	      | 		    |					   |   |
	      | 		    | ISO-8601 numeric	representation	of |   |
	      | 		    | the day of the week		   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 		    | 1 (for Monday) though 7 (for Sunday) |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%w	    |					   |   |
	      | 		    |					   |   |
	      | 		    | Numeric representation of the day of |   |
	      | 		    | the week				   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 		    | 0 (for Sunday) through 6 (for Satur- |   |
	      | 		    | day)				   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      |        Week	    |					   |   |
	      | 		    |					   |   |
	      | 		    |		      ---		   |   |
	      | 		    |					   |   |
	      | 		    |		      ---		   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%U	    |					   |   |
	      | 		    |					   |   |
	      | 		    | Week   number  of  the  given  year, |   |
	      | 		    | starting with the  first	Sunday	as |   |
	      | 		    | the first week			   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 		    | 13  (for	the  13th 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  (for	January)  through  12 (for |   |
	      | 		    | December) 			   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      |        Year	    |					   |   |
	      | 		    |					   |   |
	      | 		    |		      ---		   |   |
	      | 		    |					   |   |
	      | 		    |		      ---		   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%C	    |					   |   |
	      | 		    |					   |   |
	      | 		    | Two digit representation of the cen- |   |
	      | 		    | tury (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)				   |   |
	      | 		    |					   |   |
	      | 		    | Example: 09 for the week of  January |   |
	      | 		    | 6, 2009				   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%G	    |					   |   |
	      | 		    |					   |   |
	      | 		    |  The full four-digit version of %g   |   |
	      | 		    |					   |   |
	      | 		    | Example:	2008 for the week of Janu- |   |
	      | 		    | ary 3, 2009			   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%y	    |					   |   |
	      | 		    |					   |   |
	      | 		    | Two digit representation of the year |   |
	      | 		    |					   |   |
	      | 		    |  Example: 09 for 2009, 79 for 1979   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%Y	    |					   |   |
	      | 		    |					   |   |
	      | 		    | Four digit  representation  for  the |   |
	      | 		    | year				   |   |
	      | 		    |					   |   |
	      | 		    |		 Example: 2038		   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      |        Time	    |					   |   |
	      | 		    |					   |   |
	      | 		    |		      ---		   |   |
	      | 		    |					   |   |
	      | 		    |		      ---		   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%H	    |					   |   |
	      | 		    |					   |   |
	      | 		    | Two digit representation of the hour |   |
	      | 		    | in 24-hour format 		   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 		    |		 00 through 23		   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%k	    |					   |   |
	      | 		    |					   |   |
	      | 		    | Two digit representation of the hour |   |
	      | 		    | in 24-hour format, with a space pre- |   |
	      | 		    | ceding single digits		   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 		    |		  0 through 23		   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%I	    |					   |   |
	      | 		    |					   |   |
	      | 		    | Two digit representation of the hour |   |
	      | 		    | in 12-hour format 		   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 		    |		 01 through 12		   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      |%l (lower-case '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			   |   |
	      | 		    |					   |   |
	      | 		    | Example: AM for 00:31, PM for 22:23  |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%P	    |					   |   |
	      | 		    |					   |   |
	      | 		    | lower-case 'am' or 'pm' based on the |   |
	      | 		    | given time			   |   |
	      | 		    |					   |   |
	      | 		    | Example: am for 00:31, pm for 22:23  |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%r	    |					   |   |
	      | 		    |					   |   |
	      | 		    |	     Same as "%I:%M:%S %p"	   |   |
	      | 		    |					   |   |
	      | 		    |  Example: 09:34:17 PM for 21:34:17   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%R	    |					   |   |
	      | 		    |					   |   |
	      | 		    |		Same as "%H:%M" 	   |   |
	      | 		    |					   |   |
	      | 		    | Example:	00:35  for 12:35 AM, 16:44 |   |
	      | 		    | for 4:44 PM			   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%S	    |					   |   |
	      | 		    |					   |   |
	      | 		    | Two digit representation of the sec- |   |
	      | 		    | ond				   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 		    |		 00 through 59		   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%T	    |					   |   |
	      | 		    |					   |   |
	      | 		    |	       Same as "%H:%M:%S"	   |   |
	      | 		    |					   |   |
	      | 		    |  Example: 21:34:17 for 09:34:17 PM   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%X	    |					   |   |
	      | 		    |					   |   |
	      | 		    | Preferred  time representation based |   |
	      | 		    | on locale, without the date	   |   |
	      | 		    |					   |   |
	      | 		    |	 Example: 03:59:16 or 15:59:16	   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%z	    |					   |   |
	      | 		    |					   |   |
	      | 		    | The time	zone  offset.  Not  imple- |   |
	      | 		    | mented  as described on Windows. See |   |
	      | 		    | below for more information.	   |   |
	      | 		    |					   |   |
	      | 		    |  Example: -0500 for US Eastern Time  |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%Z	    |					   |   |
	      | 		    |					   |   |
	      | 		    | The  time  zone  abbreviation.   Not |   |
	      | 		    | implemented as described on Windows. |   |
	      | 		    | See below for more information.	   |   |
	      | 		    |					   |   |
	      | 		    |	 Example: EST for Eastern Time	   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      |Time and Date Stamps |					   |   |
	      | 		    |					   |   |
	      | 		    |		      ---		   |   |
	      | 		    |					   |   |
	      | 		    |		      ---		   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%c	    |					   |   |
	      | 		    |					   |   |
	      | 		    | Preferred date and time stamp  based |   |
	      | 		    | on locale 			   |   |
	      | 		    |					   |   |
	      | 		    | Example: Tue Feb 5 00:45:10 2009 for |   |
	      | 		    | February 5, 2009 at 12:45:10 AM	   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%D	    |					   |   |
	      | 		    |					   |   |
	      | 		    |	       Same as "%m/%d/%y"	   |   |
	      | 		    |					   |   |
	      | 		    | Example: 02/05/09  for  February	5, |   |
	      | 		    | 2009				   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%F	    |					   |   |
	      | 		    |					   |   |
	      | 		    | Same as "%Y-%m-%d" (commonly used in |   |
	      | 		    | database datestamps)		   |   |
	      | 		    |					   |   |
	      | 		    | Example: 2009-02-05 for February	5, |   |
	      | 		    | 2009				   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%s	    |					   |   |
	      | 		    |					   |   |
	      | 		    | Unix  Epoch  Time timestamp (same as |   |
	      | 		    | the time(3) function)		   |   |
	      | 		    |					   |   |
	      | 		    | Example: 305815200 for September 10, |   |
	      | 		    | 1979 08:40:00 AM			   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%x	    |					   |   |
	      | 		    |					   |   |
	      | 		    | Preferred  date representation based |   |
	      | 		    | on locale, without the time	   |   |
	      | 		    |					   |   |
	      | 		    | Example: 02/05/09  for  February	5, |   |
	      | 		    | 2009				   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      |   Miscellaneous     |					   |   |
	      | 		    |					   |   |
	      | 		    |		      ---		   |   |
	      | 		    |					   |   |
	      | 		    |		      ---		   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%n	    |					   |   |
	      | 		    |					   |   |
	      | 		    |	   A newline character ("
")	   |   |
	      | 		    |					   |   |
	      | 		    |		      ---		   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%t	    |					   |   |
	      | 		    |					   |   |
	      | 		    |	     A Tab character ("	")	   |   |
	      | 		    |					   |   |
	      | 		    |		      ---		   |   |
	      | 		    |					   |   |
	      | 		    |					   |   |
	      | 	%%	    |					   |   |
	      | 		    |					   |   |
	      | 		    | A literal percentage character ("%") |   |
	      | 		    |					   |   |
	      | 		    |		      ---		   |   |
	      | 		    |					   |   |
	      +---------------------+--------------------------------------+---+
	       Maximum length of this parameter is 1023 characters.

	      Warning

		      Contrary	to  ISO-9899:1999, Sun Solaris starts with Sunday as 1. As a result, %u may not function as described in this man-
		     ual.

	      Warning

		     Windows only:

		      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.

	      Warning

		     Mac OS X only: The %P modifier is not supported in the Mac OS X implementation of this function.

	      o $timestamp
		-  The	optional  $timestamp parameter is an integer Unix timestamp that defaults to the current local time if a $timestamp is not
		given. In other words, it defaults to the value of time(3).

RETURN VALUES

	Returns a string formatted according $format using the given $timestamp or the current local time if no  timestamp  is	given.	Month  and
       weekday names and other language-dependent strings respect the current locale set with setlocale(3).

ERRORS
/EXCEPTIONS
	Every call to a date/time function will generate a E_NOTICE if the time zone is not valid, and/or a E_STRICT or E_WARNING message if using
       the system settings or the $TZ environment variable. See also date_default_timezone_set(3)

	As the output is dependent upon the underlying C library, some conversion specifiers are not supported. On Windows, supplying unknown con-
       version	specifiers will result in 5 E_WARNING messages and return FALSE. On other operating systems you may not get any E_WARNING messages
       and the output may contain the conversion specifiers unconverted.

CHANGELOG

       +--------+---------------------------------------------------+
       |Version |						    |
       |	|						    |
       |	|		     Description		    |
       |	|						    |
       +--------+---------------------------------------------------+
       | 5.1.0	|						    |
       |	|						    |
       |	|  Now issues the E_STRICT and E_NOTICE  time  zone |
       |	| errors.					    |
       |	|						    |
       +--------+---------------------------------------------------+
EXAMPLES

	This example will work if you have the respective locales installed in your system.

       Example #1

	      strftime(3) locale examples

	      <?php
	      setlocale(LC_TIME, "C");
	      echo strftime("%A");
	      setlocale(LC_TIME, "fi_FI");
	      echo strftime(" in Finnish is %A,");
	      setlocale(LC_TIME, "fr_FR");
	      echo strftime(" in French %A and");
	      setlocale(LC_TIME, "de_DE");
	      echo strftime(" in German %A.
");
	      ?>

       Example #2

	      ISO 8601:1988 week number example

	      <?php
	      /*     December 2002 / January 2003
	      ISOWk  M	 Tu  W	 Thu F	 Sa  Su
	      ----- ----------------------------
	      51     16  17  18  19  20  21  22
	      52     23  24  25  26  27  28  29
	      1      30  31   1   2   3   4   5
	      2       6   7   8   9  10  11  12
	      3      13  14  15  16  17  18  19   */

	      // Outputs: 12/28/2002 - %V,%G,%Y = 52,2002,2002
	      echo "12/28/2002 - %V,%G,%Y = " . strftime("%V,%G,%Y", strtotime("12/28/2002")) . "
";

	      // Outputs: 12/30/2002 - %V,%G,%Y = 1,2003,2002
	      echo "12/30/2002 - %V,%G,%Y = " . strftime("%V,%G,%Y", strtotime("12/30/2002")) . "
";

	      // Outputs: 1/3/2003 - %V,%G,%Y = 1,2003,2003
	      echo "1/3/2003 - %V,%G,%Y = " . strftime("%V,%G,%Y",strtotime("1/3/2003")) . "
";

	      // Outputs: 1/10/2003 - %V,%G,%Y = 2,2003,2003
	      echo "1/10/2003 - %V,%G,%Y = " . strftime("%V,%G,%Y",strtotime("1/10/2003")) . "
";

	      /*     December 2004 / January 2005
	      ISOWk  M	 Tu  W	 Thu F	 Sa  Su
	      ----- ----------------------------
	      51     13  14  15  16  17  18  19
	      52     20  21  22  23  24  25  26
	      53     27  28  29  30  31   1   2
	      1       3   4   5   6   7   8   9
	      2      10  11  12  13  14  15  16   */

	      // Outputs: 12/23/2004 - %V,%G,%Y = 52,2004,2004
	      echo "12/23/2004 - %V,%G,%Y = " . strftime("%V,%G,%Y",strtotime("12/23/2004")) . "
";

	      // Outputs: 12/31/2004 - %V,%G,%Y = 53,2004,2004
	      echo "12/31/2004 - %V,%G,%Y = " . strftime("%V,%G,%Y",strtotime("12/31/2004")) . "
";

	      // Outputs: 1/2/2005 - %V,%G,%Y = 53,2004,2005
	      echo "1/2/2005 - %V,%G,%Y = " . strftime("%V,%G,%Y",strtotime("1/2/2005")) . "
";

	      // Outputs: 1/3/2005 - %V,%G,%Y = 1,2005,2005
	      echo "1/3/2005 - %V,%G,%Y = " . strftime("%V,%G,%Y",strtotime("1/3/2005")) . "
";

	      ?>

       Example #3

	      Cross platform compatible example using the %e modifier

	      <?php

	      // Jan 1: results in: '%e%1%' (%%, e, %%, %e, %%)
	      $format = '%%e%%%e%%';

	      // Check for Windows to find and replace the %e
	      // modifier correctly
	      if (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN') {
		  $format = preg_replace('#(?<!%)((?:%%)*)%e#', '1%#d', $format);
	      }

	      echo strftime($format);
	      ?>

       Example #4

	      Display all known and unknown formats.

	      <?php
	      // Describe the formats.
	      $strftimeFormats = array(
		  'A' => 'A full textual representation of the day',
		  'B' => 'Full month name, based on the locale',
		  'C' => 'Two digit representation of the century (year divided by 100, truncated to an integer)',
		  'D' => 'Same as "%m/%d/%y"',
		  'E' => '',
		  'F' => 'Same as "%Y-%m-%d"',
		  'G' => 'The full four-digit version of %g',
		  'H' => 'Two digit representation of the hour in 24-hour format',
		  'I' => 'Two digit representation of the hour in 12-hour format',
		  'J' => '',
		  'K' => '',
		  'L' => '',
		  'M' => 'Two digit representation of the minute',
		  'N' => '',
		  'O' => '',
		  'P' => 'lower-case "am" or "pm" based on the given time',
		  'Q' => '',
		  'R' => 'Same as "%H:%M"',
		  'S' => 'Two digit representation of the second',
		  'T' => 'Same as "%H:%M:%S"',
		  'U' => 'Week number of the given year, starting with the first Sunday as the first week',
		  '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',
		  'W' => 'A numeric representation of the week of the year, starting with the first Monday as the first week',
		  'X' => 'Preferred time representation based on locale, without the date',
		  'Y' => 'Four digit representation for the year',
		  'Z' => 'The time zone offset/abbreviation option NOT given by %z (depends on operating system)',
		  'a' => 'An abbreviated textual representation of the day',
		  'b' => 'Abbreviated month name, based on the locale',
		  'c' => 'Preferred date and time stamp based on local',
		  'd' => 'Two-digit day of the month (with leading zeros)',
		  'e' => 'Day of the month, with a space preceding single digits',
		  'f' => '',
		  'g' => 'Two digit representation of the year going by ISO-8601:1988 standards (see %V)',
		  'h' => 'Abbreviated month name, based on the locale (an alias of %b)',
		  'i' => '',
		  'j' => 'Day of the year, 3 digits with leading zeros',
		  'k' => 'Hour in 24-hour format, with a space preceding single digits',
		  'l' => 'Hour in 12-hour format, with a space preceding single digits',
		  'm' => 'Two digit representation of the month',
		  'n' => 'A newline character ("
")',
		  'o' => '',
		  'p' => 'UPPER-CASE "AM" or "PM" based on the given time',
		  'q' => '',
		  'r' => 'Same as "%I:%M:%S %p"',
		  's' => 'Unix Epoch Time timestamp',
		  't' => 'A Tab character ("	")',
		  'u' => 'ISO-8601 numeric representation of the day of the week',
		  'v' => '',
		  'w' => 'Numeric representation of the day of the week',
		  'x' => 'Preferred date representation based on locale, without the time',
		  'y' => 'Two digit representation of the year',
		  'z' => 'Either the time zone offset from UTC or the abbreviation (depends on operating system)',
		  '%' => 'A literal percentage character ("%")',
	      );

	      // Results.
	      $strftimeValues = array();

	      // Evaluate the formats whilst suppressing any errors.
	      foreach($strftimeFormats as $format => $description){
		  if (False !== ($value = @strftime("%{$format}"))){
		      $strftimeValues[$format] = $value;
		  }
	      }

	      // Find the longest value.
	      $maxValueLength = 2 + max(array_map('strlen', $strftimeValues));

	      // Report known formats.
	      foreach($strftimeValues as $format => $value){
		  echo "Known format   : '{$format}' = ", str_pad("'{$value}'", $maxValueLength), " ( {$strftimeFormats[$format]} )
";
	      }

	      // Report unknown formats.
	      foreach(array_diff_key($strftimeFormats, $strftimeValues) as $format => $description){
		  echo "Unknown format : '{$format}'   ", str_pad(' ', $maxValueLength), ($description ? " ( {$description} )" : ''), "
";
	      }
	      ?>

	      The above example will output something similar to:

	      Known format   : 'A' = 'Friday'		 ( A full textual representation of the day )
	      Known format   : 'B' = 'December' 	 ( Full month name, based on the locale )
	      Known format   : 'H' = '11'		 ( Two digit representation of the hour in 24-hour format )
	      Known format   : 'I' = '11'		 ( Two digit representation of the hour in 12-hour format )
	      Known format   : 'M' = '24'		 ( Two digit representation of the minute )
	      Known format   : 'S' = '44'		 ( Two digit representation of the second )
	      Known format   : 'U' = '48'		 ( Week number of the given year, starting with the first Sunday as the first week )
	      Known format   : 'W' = '48'		 ( A numeric representation of the week of the year, starting with the first Monday as the first week )
	      Known format   : 'X' = '11:24:44' 	 ( Preferred time representation based on locale, without the date )
	      Known format   : 'Y' = '2010'		 ( Four digit representation for the year )
	      Known format   : 'Z' = 'GMT Standard Time' ( The time zone offset/abbreviation option NOT given by %z (depends on operating system) )
	      Known format   : 'a' = 'Fri'		 ( An abbreviated textual representation of the day )
	      Known format   : 'b' = 'Dec'		 ( Abbreviated month name, based on the locale )
	      Known format   : 'c' = '12/03/10 11:24:44' ( Preferred date and time stamp based on local )
	      Known format   : 'd' = '03'		 ( Two-digit day of the month (with leading zeros) )
	      Known format   : 'j' = '337'		 ( Day of the year, 3 digits with leading zeros )
	      Known format   : 'm' = '12'		 ( Two digit representation of the month )
	      Known format   : 'p' = 'AM'		 ( UPPER-CASE "AM" or "PM" based on the given time )
	      Known format   : 'w' = '5'		 ( Numeric representation of the day of the week )
	      Known format   : 'x' = '12/03/10' 	 ( Preferred date representation based on locale, without the time )
	      Known format   : 'y' = '10'		 ( Two digit representation of the year )
	      Known format   : 'z' = 'GMT Standard Time' ( Either the time zone offset from UTC or the abbreviation (depends on operating system) )
	      Known format   : '%' = '%'		 ( A literal percentage character ("%") )
	      Unknown format : 'C'			 ( Two digit representation of the century (year divided by 100, truncated to an integer) )
	      Unknown format : 'D'			 ( Same as "%m/%d/%y" )
	      Unknown format : 'E'
	      Unknown format : 'F'			 ( Same as "%Y-%m-%d" )
	      Unknown format : 'G'			 ( The full four-digit version of %g )
	      Unknown format : 'J'
	      Unknown format : 'K'
	      Unknown format : 'L'
	      Unknown format : 'N'
	      Unknown format : 'O'
	      Unknown format : 'P'			 ( lower-case "am" or "pm" based on the given time )
	      Unknown format : 'Q'
	      Unknown format : 'R'			 ( Same as "%H:%M" )
	      Unknown format : 'T'			 ( Same as "%H:%M:%S" )
	      Unknown format : '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 )
	      Unknown format : 'e'			 ( Day of the month, with a space preceding single digits )
	      Unknown format : 'f'
	      Unknown format : 'g'			 ( Two digit representation of the year going by ISO-8601:1988 standards (see %V) )
	      Unknown format : 'h'			 ( Abbreviated month name, based on the locale (an alias of %b) )
	      Unknown format : 'i'
	      Unknown format : 'k'
	      Unknown format : 'l'			 ( Hour in 12-hour format, with a space preceding single digits )
	      Unknown format : 'n'			 ( A newline character ("
") )
	      Unknown format : 'o'
	      Unknown format : 'q'
	      Unknown format : 'r'			 ( Same as "%I:%M:%S %p" )
	      Unknown format : 's'			 ( Unix Epoch Time timestamp )
	      Unknown format : 't'			 ( A Tab character ("	") )
	      Unknown format : 'u'			 ( ISO-8601 numeric representation of the day of the week )
	      Unknown format : 'v'

NOTES

       Note

	       %G  and	%V,  which are based on ISO 8601:1988 week numbers can give unexpected (albeit correct) results if the numbering system is
	      not thoroughly understood. See %V examples in this manual page.

SEE ALSO

       Online strftime() format design tool, setlocale(3), mktime(3), strptime(3), gmstrftime(3), Open Group specification of strftime(3).

PHP Documentation Group 													       STRFTIME(3)