PHP date Format a local time/date _php tutorial

Date

(PHP 4, PHP 5)

date-formatting a local time/date

Description

String Date (string $format [, int $timestamp])

Returns a string that is the result of the timestamp of an integer in a given format string. If no timestamp is given, the local current time is used. In other words, timestamp is optional and the default value is time ().

Tip

Since PHP 5.1.1 There are several useful constants that can be used as standard date/time formats to specify the format parameter.

Tip

The timestamp of the time the request was initiated was saved in $_server[' Request_time ' from PHP 5.1.

Note:

A valid timestamp typically ranges from 20:45:54 GMT December 13, 1901 to January 19, 2038 03:14:07. (This range conforms to the minimum and maximum values of a 32-bit signed integer). However, prior to PHP 5.1, this range was limited to some systems (such as Windows) from January 1, 1970 to January 19, 2038.

Note:

To convert the time that a string is expressed to a timestamp, you should use Strtotime (). In addition some databases have some functions to convert their time format into timestamps (such as the»unix_timestamp function of MySQL).

The format string can recognize the following format parameter strings

format character	Description	example of return value
Day	---	---
D	The day ordinal of a month with a leading zero 2-digit number	01 to 31
D	Day of the week, text representation, 3 letters	Mon to Sun
J	The day ordinal of the month without leading zeros	1 to 31
L (Lowercase letter of "L")	Day of the week, full text format	Sunday to Saturday
N	ISO-8601 format number represents the day of the week (PHP 5.1.0 new Plus)	1 (for Monday) to 7 (= Sunday)
S	English suffix, 2 characters, after the number of days per month	st,nd,rd or th. Can be used with J.
W	Day of the week, numbers indicate	0 (for Sunday) to 6 (= Saturday)
Z	The day ordinal of the year	0 to 366
Week	---	---
W	Week of the ISO-8601 format year, starting from Monday (PHP 4.1.0 New)	Example: 42 (42nd Week of the year)
Month	---	---
F	month, full text format, such as January or March	January to December
M	A number represents the month, with a leading zero	01 to 12
M	Three letter abbreviation for month	Jan to Dec
N	The number represents the month, without leading zeros	1 to 12
T	The number of days that a given month should be	28 to 31
Years	---	---
L	Whether it is a leap year	If the leap year is 1, otherwise 0
O	ISO-8601 format year number. This is the same value as Y, except if the day of the Week (W) of the ISO belongs to the previous year or the next year. (PHP 5.1.0 new addition)	examples:1999 or 2003
Y	4-digit year in full representation	Example: 1999 or 2003
Y	Year 2-digit representation	Example: 99 or 03
Time	---	---
A	Lowercase morning and afternoon values	AM or PM
A	Uppercase morning and afternoon values	AM or PM
B	Swatch Internet Standard Time	000 to 999
G	Hours, 12-hour format, no leading zeros	1 to 12
G	Hours, 24-hour format, no leading zeros	0 to 23
H	Hours, 12-hour format, with leading zeros	01 to 12
H	Hours, 24-hour format, with leading zeros	00 to 23
I	Number of minutes with leading zeros	00 to 59>
S	Number of seconds with leading zeros	00 to 59>
Time	---	---
E	Time zone ID (PHP 5.1.0 new addition)	Example: Utc,gmt,atlantic/azores
I	Whether it is daylight saving time	If daylight saving time is 1, otherwise 0
O	Hours of difference from GMT	Example: +0200
P	Difference from GMT (GMT), between hours and minutes colon separated (PHP 5.1.3 New)	Example: +02:00
T	The time zone in which this machine resides	For example: EST,MDT ("translator note" in the full text format under Windows, such as "Eastern Standard Time", the Chinese version will show "China normal times").
Z	The number of seconds of the slack offset. The time zone offset in the west of UTC is always negative, and the time zone offset to the east of UTC is always positive.	43200 to 43200
Full Date/Time	---	---
C	Date in ISO 8601 format (PHP 5 new)	2004-02-12t15:19:21+00:00
R	Date in RFC 822 format	Example: Thu, DEC 2000 16:01:07 +0200
U	The number of seconds since the Unix era (January 1 1970 00:00:00 GMT) started	See Time ()

Characters that are not recognized in the format string are displayed as-is. The Z format always returns 0 when using Gmdate ().

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