mktime
strptime
Date/Time 함수 목록
PHP Manual

# strftime

(PHP 4, PHP 5)

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

### 설명

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

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().

Not all conversion specifiers may be supported by your C library, in which case they will not be supported by PHP's strftime(). Additionally, 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.

### 인수

`format`

  The following characters are recognized in the `format` parameter string
  `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 | 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 (for Monday) though 7 (for Sunday)
  %w | Numeric representation of the day of the week | 0 (for Sunday) through 6 (for Saturday)
  Week | --- | ---
  %U | Week number of the given year, starting with the 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 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) | Example: 09 for the week of January 6, 2009
  %G | The full four-digit version of %g | Example: 2008 for the week of January 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
  %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 preceeding 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 second | 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 | Either the time zone offset from UTC or the abbreviation (depends on operating system) | Example: -0500 or EST for Eastern Time
  %Z | The time zone offset/abbreviation option NOT given by %z (depends on operating system) | Example: -0500 or EST for Eastern Time
  Time and Date Stamps | --- | ---
  %c | Preferred date and time stamp based on local | Example: Tue Feb 5 00:45:10 2009 for February 4, 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() 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 ("\n") | ---
  %t | A Tab character ("\t") | ---
  %% | A literal percentage character ("%") | ---

  Maximum length of this parameter is 1023 characters.

  Warning

  Contrary to ISO-9889:1999, Sun Solaris starts with Sunday as 1. As a result, %u may not function as described in this manual.

`timestamp`

  선택적인 `timestamp` 인수는 `timestamp` 가 주어지지 않았을 경우, 현재 로컬 시간을 기본값으로 가지는 integer 유닉스 타임스탬프입니다. 즉, 기본값은 time() 값입니다.

### 반환값

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().

### 오류/예외

모든 날짜/시간 함수 호출은 시간대가 유효하지 않을 때 `E_NOTICE`를, 시스템 설정이나 TZ 환경 변수를 사용할 때 `E_STRICT`를 생성합니다. date_default_timezone_set()을 참고하십시오.

### 변경점

버전 | 설명
--- | ---
5.1.0 | 시간대 오류시 `E_STRICT`와 `E_NOTICE`가 발생합니다.

### 예제

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

Example #1 strftime() 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.\n");
?>`

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")) . "\n";
// 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")) . "\n";
// 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")) . "\n";
// 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")) . "\n";
/* 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")) . "\n";
// 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")) . "\n";
// 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")) . "\n";
// 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")) . "\n";
?>`

### 주의

> 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.

### 참고

- setlocale() - Set locale information
- mktime() - Get Unix timestamp for a date
- strptime() - Parse a time/date generated with strftime
- gmstrftime() - Format a GMT/UTC time/date according to locale settings
- » Open Group specification of strftime()

mktime
strptime
Date/Time 함수 목록
PHP Manual