DateTime::createFromFormat

date_create_from_format

(PHP 5 >= 5.3.0, PHP 7)

DateTime::createFromFormat -- date_create_from_format — Parses a time string according to a specified format

설명

객체 기반 형식

public static DateTime DateTime::createFromFormat ( string $format , string $time [, DateTimeZone $timezone ] )

절차식 형식

DateTime date_create_from_format ( string $format , string $time [, DateTimeZone $timezone ] )

Returns a new DateTime object representing the date and time specified by the time string, which was formatted in the given format.

인수

format

The format that the passed in string should be in. See the formatting options below. In most cases, the same letters as for the date() can be used.

**The following characters are recognized in the `format` parameter string**
`format` character	Description	Example parsable values
Day	---	---
d and j	Day of the month, 2 digits with or without leading zeros	01 to 31 or 1 to 31
D and l	A textual representation of a day	Mon through Sun or Sunday through Saturday
S	English ordinal suffix for the day of the month, 2 characters. It's ignored while processing.	st, nd, rd or th.
z	The day of the year (starting from 0)	0 through 365
Month	---	---
F and M	A textual representation of a month, such as January or Sept	January through December or Jan through Dec
m and n	Numeric representation of a month, with or without leading zeros	01 through 12 or 1 through 12
Year	---	---
Y	A full numeric representation of a year, 4 digits	Examples: 1999 or 2003
y	A two digit representation of a year (which is assumed to be in the range 1970-2069, inclusive)	Examples: 99 or 03 (which will be interpreted as 1999 and 2003, respectively)
Time	---	---
a and A	Ante meridiem and Post meridiem	am or pm
g and h	12-hour format of an hour with or without leading zero	1 through 12 or 01 through 12
G and H	24-hour format of an hour with or without leading zeros	0 through 23 or 00 through 23
i	Minutes with leading zeros	00 to 59
s	Seconds, with leading zeros	00 through 59
u	Microseconds (up to six digits)	Example: 45, 654321
Timezone	---	---
e, O, P and T	Timezone identifier, or difference to UTC in hours, or difference to UTC with colon between hours and minutes, or timezone abbreviation	Examples: UTC, GMT, Atlantic/Azores or +0200 or +02:00 or EST, MDT
Full Date/Time	---	---
U	Seconds since the Unix Epoch (January 1 1970 00:00:00 GMT)	Example: 1292177455
Whitespace and Separators	---	---
(space)	One space or one tab	Example:
#	One of the following separation symbol: ;, :, /, ., ,, -, ( or )	Example: /
;, :, /, ., ,, -, ( or )	The specified character.	Example: -
?	A random byte	Example: ^ (Be aware that for UTF-8 characters you might need more than one ?. In this case, using * is probably what you want instead)
*	Random bytes until the next separator or digit	Example: * in Y--d* with the string 2009-aWord-08 will match aWord
!	Resets all fields (year, month, day, hour, minute, second, fraction and timzone information) to the Unix Epoch	Without !, all fields will be set to the current date and time.
\|	Resets all fields (year, month, day, hour, minute, second, fraction and timzone information) to the Unix Epoch if they have not been parsed yet	Y-m-d\| will set the year, month and day to the information found in the string to parse, and sets the hour, minute and second to 0.
+	If this format specifier is present, trailing data in the string will not cause an error, but a warning instead	Use DateTime::getLastErrors() to find out whether trailing data was present.

Unrecognized characters in the format string will cause the parsing to fail and an error message is appended to the returned structure. You can query error messages with DateTime::getLastErrors().

To include literal characters in format, you have to escape them with a backslash (\).

If format does not contain the character ! then portions of the generated time which are not specified in format will be set to the current system time.

If format contains the character !, then portions of the generated time not provided in format, as well as values to the left-hand side of the !, will be set to corresponding values from the Unix epoch.

The Unix epoch is 1970-01-01 00:00:00 UTC.

time

String representing the time.

timezone

A DateTimeZone object representing the desired time zone.

If timezone is omitted and time contains no timezone, the current timezone will be used.

Note:
The timezone parameter and the current timezone are ignored when the time parameter either contains a UNIX timestamp (e.g. 946684800) or specifies a timezone (e.g. 2010-01-28T15:00:00+02:00).

반환값

Returns a new DateTime instance실패 시 FALSE를 반환합니다.

변경점

버전	설명
5.3.9	The + `format` specifier has been added.

예제

Example #1 DateTime::createFromFormat() example

객체 기반 형식


<?php
$date = DateTime::createFromFormat('j-M-Y', '15-Feb-2009');
echo $date->format('Y-m-d');
?>

절차식 형식


<?php
$date = date_create_from_format('j-M-Y', '15-Feb-2009');
echo date_format($date, 'Y-m-d');
?>

위 예제들의 출력:

2009-02-15

Example #2 Intricacies of DateTime::createFromFormat()


<?php
echo 'Current time: ' . date('Y-m-d H:i:s') . "\n";

$format = 'Y-m-d';
$date = DateTime::createFromFormat($format, '2009-02-15');
echo "Format: $format; " . $date->format('Y-m-d H:i:s') . "\n";

$format = 'Y-m-d H:i:s';
$date = DateTime::createFromFormat($format, '2009-02-15 15:16:17');
echo "Format: $format; " . $date->format('Y-m-d H:i:s') . "\n";

$format = 'Y-m-!d H:i:s';
$date = DateTime::createFromFormat($format, '2009-02-15 15:16:17');
echo "Format: $format; " . $date->format('Y-m-d H:i:s') . "\n";

$format = '!d';
$date = DateTime::createFromFormat($format, '15');
echo "Format: $format; " . $date->format('Y-m-d H:i:s') . "\n";
?>

위 예제의 출력 예시:

Current time: 2010-04-23 10:29:35
Format: Y-m-d; 2009-02-15 10:29:35
Format: Y-m-d H:i:s; 2009-02-15 15:16:17
Format: Y-m-!d H:i:s; 1970-01-15 15:16:17
Format: !d; 1970-01-15 00:00:00

Example #3 Format string with literal characters


<?php
echo DateTime::createFromFormat('H\h i\m s\s','23h 15m 03s')->format('H:i:s');
?>

위 예제의 출력 예시:

23:15:03

참고

DateTime::__construct() - Returns new DateTime object
DateTime::getLastErrors() - Returns the warnings and errors
checkdate() - 그레고리력 날짜를 확인합니다
strptime() - Parse a time/date generated with strftime

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User Contributed Notes 2 notes

down

Steven De Volder ¶

1 year ago


In the following code:
$t = microtime(true);
$now = DateTime::createFromFormat('U.u', $t);
$now = $now->format("H:i:s.v");

Trying to format() will return a fatal error if microtime(true) just so happened to return a float with all zeros as decimals. This is because DateTime::createFromFormat('U.u', $aFloatWithAllZeros) returns false.

Workaround (the while loop is for testing if the solution works):

$t = microtime(true);
$now = DateTime::createFromFormat('U.u', $t);
while (!is_bool($now)) {//for testing solution
    $t = microtime(true);
    $now = DateTime::createFromFormat('U.u', $t);
}
if (is_bool($now)) {//the problem
    $now = DateTime::createFromFormat('U', $t);//the solution
}
$now = $now->format("H:i:s.v");

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mariani dot v at sfeir dot com ¶

11 months ago


An easiest way to avoid error when microtime returns a non decimal float is to cast its result as a float using sprintf : 

$t = microtime(true);
$now = DateTime::createFromFormat('U.u', sprintf('%f', $t));
$now = $now->format("H:i:s.v");

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