Date Function In PHP

Ø       date()

• Returns a string formatted according to the given format string using the given integer timestamp or the current local time if no timestamp is given.
• In other words, timestamp is optional and defaults to the value of time().

Syntax

                   string date(string $format[,int timestamp])

Parameter	Description
$format	The format of the outputted date string. The following character are recognized in the format parameter string.

The following characters are recognized in the format parameter string
format character	Description	Example returned values
Day	---	---
D	Day of the month, 2 digits with leading zeros	01 to 31
D	A textual representation of a day, three letters	Mon through Sun
J	Day of the month without leading zeros	1 to 31
L (lowercase 'L')	A full textual representation of the day of the week	Sunday 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)
S	English ordinal suffix for the day of the month, 2 characters	st, nd, rd or th. Works well with j
W	Numeric representation of the day of the week	0 (for Sunday) through 6 (for Saturday)
Z	The day of the year (starting from 0)	0 through 365
Week	---	---
W	ISO-8601 week number of year, weeks starting on Monday (added in PHP 4.1.0)	Example: 42 (the 42nd week in the year)
Month	---	---
F	A full textual representation of a month, such as January or March	January through December
M	Numeric representation of a month, with leading zeros	01 through 12
M	A short textual representation of a month, three letters	Jan through Dec
N	Numeric representation of a month, without leading zeros	1 through 12
T	Number of days in the given month	28 through 31
Year	---	---
L	Whether it's a leap year	1 if it is a leap year, 0 otherwise.
O	ISO-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
Y	A full numeric representation of a year, 4 digits	Examples: 1999 or 2003
Y	A two digit representation of a year	Examples: 99 or 03
Time	---	---
A	Lowercase Ante meridiem and Post meridiem	am or pm
A	Uppercase Ante meridiem and Post meridiem	AM or PM
B	Swatch Internet time	000 through 999
G	12-hour format of an hour without leading zeros	1 through 12
G	24-hour format of an hour without leading zeros	0 through 23
H	12-hour format of an hour with leading zeros	01 through 12
H	24-hour format of an hour with leading zeros	00 through 23
I	Minutes with leading zeros	00 to 59
S	Seconds, with leading zeros	00 through 59
U	Microseconds (added in PHP 5.2.2)	Example: 654321
Timezone	---	---
e	Timezone identifier (added in PHP 5.1.0)	Examples: UTC, GMT, Atlantic/Azores
I (capital i)	Whether or not the date is in daylight saving time	1 if Daylight Saving Time, 0 otherwise.
O	Difference to Greenwich time (GMT) in hours	Example: +0200
P	Difference to Greenwich time (GMT) with colon between hours and minutes (added in PHP 5.1.3)	Example: +02:00
T	Timezone abbreviation	Examples: EST, MDT ...
Z	Timezone 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/Time	---	---
C	ISO 8601 date (added in PHP 5)	2004-02-12T15:19:21+00:00
R	» RFC 2822 formatted date	Example: Thu, 21 Dec 2000 16:01:07 +0200
U	Seconds since the Unix Epoch (January 1 1970 00:00:00 GMT)	See also time()

Example

<?php

          echo date("d/m/y");

?>

Output

14/8/11

Ø       getdate()

• Get date/time information.

Syntax

                   array getdate([int timestamp])

• Returns an associative array containing the date information of the timestamp, or the current local time if no timestamp is given, as the following associative array elements.
• Key elements of the returned associative array.

Key elements of the returned associative array
Key	Description	Example returned values
"seconds"	Numeric representation of seconds	0 to 59
"minutes"	Numeric representation of minutes	0 to 59
"hours"	Numeric representation of hours	0 to 23
"mday"	Numeric representation of the day of the month	1 to 31
"wday"	Numeric representation of the day of the week	0 (for Sunday) through 6 (for Saturday)
"mon"	Numeric representation of a month	1 through 12
"year"	A full numeric representation of a year, 4 digits	Examples: 1999 or 2003
"yday"	Numeric representation of the day of the year	0 through 365
"weekday"	A full textual representation of the day of the week	Sunday through Saturday
"month"	A full textual representation of a month, such as January or March	January through December
0	Seconds since the Unix Epoch, similar to the values returned by time() and used by date().	System Dependent, typically -2147483648 through 2147483647.

Example

<?php

          $today = getdate();

          print_r($today);

?>

Output

Array ( [seconds] => 3 [minutes] => 38 [hours] => 9 [mday] => 14 [wday] => 0 [mon] => 8 [year] => 2011 [yday] => 225 [weekday] => Sunday [month] => August [0] => 1313314683 )

Ø       checkdate()

·         Returns TRUE if the date given is valid, otherwise returns FALSE. checks the validity of the date formed by the argument.

Syntax

                   bool checkdate(int $month,int $day,int $year)

Parameter	Description
$month	The month between 1 and 12 inclusive.
$day	The day is within the allowed number of days for the given month leep year are also taken into consideration.
$year	The year is between 1 and 32,767 inclusive.

Example

<?php

          var_dump(checkdate(9,31,2011));

          var_dump(checkdate(9,30,2011));

?>

Output

bool(false)
bool(true)

           

Ø       time()

• Return current unix timestamp.

Syntax

                   int time(void)

·         Returns the current time measured in the number of seconds since the unix epoch.

Example

<?php

          echo time();

?>

Ø       mktime()

Syntax

int mktime([int $hour [, int $minute [, int $second [, int $month [, int $day [, int $year [, int is_dst]]]]]]] )

• Returns the unix timestamp corresponding to the argument given. This timestamp is a long integer containing the number of seconds between the unix epoch.

Parameter	Description
$is_dst	This parameter can be set to one if the time is during daylight saving time, 0 if it is not set, or -1 If it Is unknown whether the time is within daylight saving time or not

Example

<?php

          echo date("m-d-y".mktime(0,0,0,12,32,1997));

?>

Posted By : Hemangi Zala