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PHP Date Function Reference : date();

CharacterDescriptionExample returned values
dDay of the month, 2 digits with leading zeros01 to 31
DA textual representation of a day, three lettersMon through Sun
jDay of the month without leading zeros1 to 31
l(lowercase 'L') - A full textual representation of the day of the weekSunday through Saturday
N ISO-8601 numeric representation of the day of the week (added in PHP 5.1.0)1 (for Monday) through 7 (for Sunday)
SEnglish ordinal suffix for the day of the month, 2 charactersst, nd, rd or th. Works well with j
wNumeric representation of the day of the week0 (for Sunday) through 6 (for Saturday)
zThe day of the year (starting from 0)0 through 365
WISO-8601 week number of year, weeks starting on Monday (added in PHP 4.1.0)Example: 42 (the 42nd week in the year)
CharacterDescriptionExample returned values
FA full textual representation of a month, such as January or MarchJanuary through December
mNumeric representation of a month, with leading zeros01 through 12
MA short textual representation of a month, three lettersJan through Dec
nNumeric representation of a month, without leading zeros1 through 12
tNumber of days in the given month28 through 31
CharacterDescriptionExample returned values
LWhether it's a leap year1 if it is a leap year, 0 otherwise.
oISO-8601 year number. This has the same value as Y,except that if the ISO week number (W) belongs to the previous or next year, that year is used instead. (added in PHP 5.1.0)Examples: 1999 or 2003
YA full numeric representation of a year, 4 digitsExamples: 1999 or 2003
yA two digit representation of a yearExamples: 99 or 03
CharacterDescriptionExample returned values
aLowercase Ante meridiem and Post meridiemam or pm
AUppercase Ante meridiem and Post meridiemAM or PM
BSwatch Internet time000 through 999
g12-hour format of an hour without leading zeros1 through 12
G24-hour format of an hour without leading zeros0 through 23
h12-hour format of an hour with leading zeros01 through 12
H24-hour format of an hour with leading zeros00 through 23
iMinutes with leading zeros00 to 59
sSeconds, with leading zeros00 through 59
uMilliseconds (added in PHP 5.2.2)Example: 54321
CharacterDescriptionExample returned values
eTimezone identifier (added in PHP 5.1.0)Examples: UTC, GMT,Atlantic/Azores
I (capital i)Whether or not the date is in daylight saving time1 if Daylight Saving Time, 0 otherwise.
ODifference to Greenwich time (GMT) in hoursExample: +0200
PDifference to Greenwich time (GMT) with colon between hours and minutes (added in PHP 5.1.3)Example: +02:00
TTimezone abbreviationExamples: EST, MDT...
ZTimezone offset in seconds. The offset for timezones west of UTC is always negative, and for those east of UTC is always positive.-43200 through 50400
Full Date and Time
CharacterDescriptionExample returned values
cISO 8601 date (added in PHP 5)2004-02-12T15:19:21+00:00
r»RFC 2822 formatted dateExample: Thu, 21 Dec 2000 16:01:07 +0200
USeconds since the Unix Epoch (January 1 1970 00:00:00 GMT)See also PHPtime(); function

Source : www.php.net

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