PHP Date/time functions

Runtime Configuration

The behavior of the Date/time function is affected by the settings in php.ini:

name	Description	default	PHP version
Date.timezone	Specify the default time zone (all Date/time functions use this option)	""	PHP 5.1
Date.default_latitude	Specify Default latitude (Date_sunrise () and Date_sunset () Use this option)	"31.7667"	PHP 5.0
Date.default_longitude	Specify default longitude (Date_sunrise () and Date_sunset () to use this option)	"35.2333"	PHP 5.0
Date.sunrise_zenith	Specifies the default Sunrise Zenith (Date_sunrise () and Date_sunset () Use this option)	"90.83"	PHP 5.0
Date.sunset_zenith	Specifies the default sunset Zenith (Date_sunrise () and Date_sunset () Use this option)	"90.83"	PHP 5.0

PHP 5 Date/time functions

function	Description
Checkdate ()	Verify the Gregorian date.
Date_add ()	Add days, months, years, hours, minutes, and seconds to a date.
Date_create_from_format ()	Returns a new DateTime object that is formatted according to the specified format.
Date_create ()	Returns a new DateTime object.
Date_date_set ()	Set a new date.
Date_default_timezone_get ()	Returns the default time zone, which is used by all date/time functions.
Date_default_timezone_set ()	Set the default time zone, which is used by all date/time functions.
Date_diff ()	Returns the difference between two days.
Date_format ()	Returns the date formatted according to the specified format.
Date_get_last_errors ()	Returns a warning/error in a date string.
Date_interval_create_from_date_string ()	Create a dateinterval from the relevant part of the string.
Date_interval_format ()	Formats the time interval.
Date_isodate_set ()	Set the ISO date.
Date_modify ()	Modifies the timestamp.
Date_offset_get ()	Returns the time zone offset.
Date_parse_from_format ()	Returns an associative array with details of the specified date, according to the specified format.
Date_parse ()	Returns an associative array with detailed information for the specified date.
Date_sub ()	Subtracts days, months, years, hours, minutes, and seconds from a specified date.
Date_sun_info ()	Returns an array containing information about the sunrise/sunset and Dusk start/dusk end of the specified date and place.
Date_sunrise ()	Returns the sunrise time for the specified date and place.
Date_sunset ()	Returns the sunset time for the specified date and place.
Date_time_set ()	Set the time.
Date_timestamp_get ()	Returns the Unix timestamp.
Date_timestamp_set ()	Sets the date and time based on the Unix timestamp.
Date_timezone_get ()	Returns the time zone for a given DateTime object.
Date_timezone_set ()	Sets the time zone for a DateTime object.
Date ()	Formats the local date and time.
GETDATE ()	Returns the date/time information for a timestamp or the current local date/time.
Gettimeofday ()	Returns the current time.
Gmdate ()	Formats the GMT/UTC date and time.
Gmmktime ()	Returns the UNIX timestamp for the GMT date.
Gmstrftime ()	Formats the GMT/UTC date and time according to locale settings.
Idate ()	Formats the local time/date as an integer.
LocalTime ()	Returns the local time.
Microtime ()	Returns the number of microseconds for the current Unix timestamp.
Mktime ()	Returns a Unix timestamp for a date.
Strftime ()	Formats local time/date according to locale.
Strptime ()	Resolves the time/date generated by Strftime ().
Strtotime ()	Resolves the date or time description of any English text to a Unix timestamp.
Time ()	Returns the Unix timestamp for the current time.
Timezone_abbreviations_list ()	Returns an associative array that contains the daylight saving time, offset, and timezone name.
Timezone_identifiers_list ()	Returns an array of values with all time zone identifiers.
Timezone_location_get ()	Returns the location information for the specified time zone.
Timezone_name_from_ abbr ()	Returns the time zone name according to the time zone abbreviation.
Timezone_name_get ()	Returns the name of the time zone.
Timezone_offset_get ()	Returns the time zone offset relative to GMT.
Timezone_open ()	Creates a new Datetimezone object.
Timezone_transitions_get ()	Returns all transitions for the time zone.
Timezone_version_get ()	Returns the version of the time zone database.

PHP 5 pre-defined Date/time constants

Constants	Description
Date_atom	Atom (ex: 2005-08-15t16:13:03+0000)
Date_cookie	HTTP Cookies (for example: Sun, 2005 16:13:03 UTC)
date_iso8601	ISO-8601 (ex: 2005-08-14t16:13:03+0000)
date_rfc822	RFC 822 (for example: Sun, 2005 16:13:03 UTC)
date_rfc850	RFC 850 (for example: Sunday, 14-aug-05 16:13:03 UTC)
date_rfc1036	RFC 1036 (for example: Sunday, 14-aug-05 16:13:03 UTC)
Date_rfc1123	RFC 1123 (for example: Sun, 2005 16:13:03 UTC)
date_rfc2822	RFC 2822 (for example: Sun, 2005 16:13:03 +0000)
Date_rss	RSS (ex: Sun, 2005 16:13:03 UTC)
date_w3c	World Wide Web Consortium (ex: 2005-08-14t16:13:03+0000)

PHP date/time functions