Docs For Class Date

string beginOfMonth(
[int
$month = 0], [int
$year = 0], [string
$format = DATE_CALC_FORMAT])

Return date of first day of month of given date

Return: the date in the desired format
See: Date_Calc::beginOfMonthBySpan()
Deprecated: Method deprecated in Release 1.5.0
Access: public

Parameters:

int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year
string	`$format`	—	the string indicating how to format the output

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string beginOfMonthBySpan(
[int
$months = 0], [string
$month = 0], [string
$year = 0], [string
$format = DATE_CALC_FORMAT])

Returns date of the first day of the month in the number of months from the given date

Return: the date in the desired format
Since: Method available since Release 1.5.0
Access: public

Parameters:

int	`$months`	—	the number of months from the date provided. Positive numbers go into the future. Negative numbers go into the past. is the month presented in $month.
string	`$month`	—	the month, default is current local month
string	`$year`	—	the year in four digit format, default is the current local year
string	`$format`	—	the string indicating how to format the output

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string beginOfNextMonth(
[int
$day = 0], [int
$month = 0], [int
$year = 0], [string
$format = DATE_CALC_FORMAT])

Returns date of begin of next month of given date

Return: the date in the desired format
See: Date_Calc::beginOfMonthBySpan()
Deprecated: Method deprecated in Release 1.5.0
Access: public

Parameters:

int	`$day`	—	the day of the month, default is current local day
int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year
string	`$format`	—	the string indicating how to format the output

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string beginOfNextWeek(
[int
$day = 0], [int
$month = 0], [int
$year = 0], [string
$format = DATE_CALC_FORMAT])

Find the month day of the beginning of week after given date, using DATE_CALC_BEGIN_WEEKDAY

Can return weekday of prev month.

Return: the date in the desired format
Access: public

Parameters:

int	`$day`	—	the day of the month, default is current local day
int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year
string	`$format`	—	the string indicating how to format the output

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string beginOfPrevMonth(
[int
$day = 0], [int
$month = 0], [int
$year = 0], [string
$format = DATE_CALC_FORMAT])

Returns date of the first day of previous month of given date

Return: the date in the desired format
See: Date_Calc::beginOfMonthBySpan()
Deprecated: Method deprecated in Release 1.5.0
Access: public

Parameters:

int	`$day`	—	the day of the month, default is current local day
int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year
string	`$format`	—	the string indicating how to format the output

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string beginOfPrevWeek(
[int
$day = 0], [int
$month = 0], [int
$year = 0], [string
$format = DATE_CALC_FORMAT])

Find the month day of the beginning of week before given date, using DATE_CALC_BEGIN_WEEKDAY

Can return weekday of prev month.

Return: the date in the desired format
Access: public

Parameters:

int	`$day`	—	the day of the month, default is current local day
int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year
string	`$format`	—	the string indicating how to format the output

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string beginOfWeek(
[int
$day = 0], [int
$month = 0], [int
$year = 0], [string
$format = DATE_CALC_FORMAT])

Find the month day of the beginning of week for given date, using DATE_CALC_BEGIN_WEEKDAY

Can return weekday of prev month.

Return: the date in the desired format
Access: public

Parameters:

int	`$day`	—	the day of the month, default is current local day
int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year
string	`$format`	—	the string indicating how to format the output

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int compareDates(
int
$day1, int
$month1, int
$year1, int
$day2, int
$month2, int
$year2)

Compares two dates

Return: 0 if the dates are equal. 1 if date 1 is later, -1 if date 1 is earlier.
Access: public

Parameters:

int	`$day1`	—	the day of the month
int	`$month1`	—	the month
int	`$year1`	—	the year. Use the complete year instead of the abbreviated version. E.g. use 2005, not 05. Do not add leading 0's for years prior to 1000.
int	`$day2`	—	the day of the month
int	`$month2`	—	the month
int	`$year2`	—	the year. Use the complete year instead of the abbreviated version. E.g. use 2005, not 05. Do not add leading 0's for years prior to 1000.

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int dateDiff(
int
$day1, int
$month1, int
$year1, int
$day2, int
$month2, int
$year2)

Returns number of days between two given dates

Return: the absolute number of days between the two dates. If an error occurs, -1 is returned.
Access: public

Parameters:

int	`$day1`	—	the day of the month
int	`$month1`	—	the month
int	`$year1`	—	the year. Use the complete year instead of the abbreviated version. E.g. use 2005, not 05. Do not add leading 0's for years prior to 1000.
int	`$day2`	—	the day of the month
int	`$month2`	—	the month
int	`$year2`	—	the year. Use the complete year instead of the abbreviated version. E.g. use 2005, not 05. Do not add leading 0's for years prior to 1000.

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string dateFormat(
int
$day, int
$month, int
$year, string
$format)

Formats the date in the given format, much like strfmt()

This function is used to alleviate the problem with 32-bit numbers for dates pre 1970 or post 2038, as strfmt() has on most systems. Most of the formatting options are compatible.

Formatting options:

 %a   abbreviated weekday name (Sun, Mon, Tue)
 %A   full weekday name (Sunday, Monday, Tuesday)
 %b   abbreviated month name (Jan, Feb, Mar)
 %B   full month name (January, February, March)
 %d   day of month (range 00 to 31)
 %e   day of month, single digit (range 0 to 31)
 %E   number of days since unspecified epoch (integer)
        (%E is useful for passing a date in a URL as
        an integer value. Then simply use
        daysToDate() to convert back to a date.)
 %j   day of year (range 001 to 366)
 %m   month as decimal number (range 1 to 12)
 %n   newline character (\n)
 %t   tab character (\t)
 %w   weekday as decimal (0 = Sunday)
 %U   week number of current year, first sunday as first week
 %y   year as decimal (range 00 to 99)
 %Y   year as decimal including century (range 0000 to 9999)
 %%   literal '%'

Return: the date in the desired format
Access: public

Parameters:

int	`$day`	—	the day of the month
int	`$month`	—	the month
int	`$year`	—	the year. Use the complete year instead of the abbreviated version. E.g. use 2005, not 05. Do not add leading 0's for years prior to 1000.
string	`$format`	—	the format string

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string dateNow(
[string
$format = DATE_CALC_FORMAT])

Returns the current local date

NOTE: This function retrieves the local date using strftime(), which may or may not be 32-bit safe on your system.

Return: the current date in the specified format
Access: public

Parameters:

string $format — the string indicating how to format the output

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float dateSeason(
string
$season, [string
$year = 0])

Determines julian date of the given season

Adapted from previous work in Java by James Mark Hamilton.

Return: the julian date the season starts on
Author: Robert Butler <rob@maxwellcreek.org>
Author: James Mark Hamilton <mhamilton@qwest.net>
Access: public

Parameters:

string	`$season`	—	the season to get the date for: VERNALEQUINOX, SUMMERSOLSTICE, AUTUMNALEQUINOX, or WINTERSOLSTICE
string	`$year`	—	the year in four digit format. Must be between -1000BC and 3000AD.

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integer dateToDays(
int
$day, int
$month, int
$year)

Converts a date to number of days since a distant unspecified epoch

Return: the number of days since the Date_Calc epoch
Access: public

Parameters:

int	`$day`	—	the day of the month
int	`$month`	—	the month
int	`$year`	—	the year. Use the complete year instead of the abbreviated version. E.g. use 2005, not 05. Do not add leading 0's for years prior to 1000.

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int dayOfWeek(
[int
$day = 0], [int
$month = 0], [int
$year = 0])

Returns day of week for given date (0 = Sunday)

Return: the number of the day in the week
Access: public

Parameters:

int	`$day`	—	the day of the month, default is current local day
int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year

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int daysInMonth(
[int
$month = 0], [int
$year = 0])

Find the number of days in the given month

Return: the number of days the month has
Access: public

Parameters:

int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year

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string daysToDate(
int
$days, [string
$format = DATE_CALC_FORMAT])

Converts number of days to a distant unspecified epoch

Return: the date in the desired format
Access: public

Parameters:

int	`$days`	—	the number of days since the Date_Calc epoch
string	`$format`	—	the string indicating how to format the output

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string defaultCentury(
int
$year)

Turns a two digit year into a four digit year

From '51 to '99 is in the 1900's, otherwise it's in the 2000's.

Return: the 4 digit year
Access: public

Parameters:

int $year — the 2 digit year

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string endOfMonthBySpan(
[int
$months = 0], [string
$month = 0], [string
$year = 0], [string
$format = DATE_CALC_FORMAT])

Returns date of the last day of the month in the number of months from the given date

Return: the date in the desired format
Since: Method available since Release 1.5.0
Access: public

Parameters:

int	`$months`	—	the number of months from the date provided. Positive numbers go into the future. Negative numbers go into the past. is the month presented in $month.
string	`$month`	—	the month, default is current local month
string	`$year`	—	the year in four digit format, default is the current local year
string	`$format`	—	the string indicating how to format the output

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string endOfNextMonth(
[int
$day = 0], [int
$month = 0], [int
$year = 0], [string
$format = DATE_CALC_FORMAT])

Returns date of the last day of next month of given date

Return: the date in the desired format
See: Date_Calc::endOfMonthBySpan()
Deprecated: Method deprecated in Release 1.5.0
Access: public

Parameters:

int	`$day`	—	the day of the month, default is current local day
int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year
string	`$format`	—	the string indicating how to format the output

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string endOfPrevMonth(
[int
$day = 0], [int
$month = 0], [int
$year = 0], [string
$format = DATE_CALC_FORMAT])

Returns date of the last day of previous month for given date

Return: the date in the desired format
See: Date_Calc::endOfMonthBySpan()
Deprecated: Method deprecated in Release 1.5.0
Access: public

Parameters:

int	`$day`	—	the day of the month, default is current local day
int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year
string	`$format`	—	the string indicating how to format the output

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string endOfWeek(
[int
$day = 0], [int
$month = 0], [int
$year = 0], [string
$format = DATE_CALC_FORMAT])

Find the month day of the end of week for given date, using DATE_CALC_BEGIN_WEEKDAY

Can return weekday of following month.

Return: the date in the desired format
Access: public

Parameters:

int	`$day`	—	the day of the month, default is current local day
int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year
string	`$format`	—	the string indicating how to format the output

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int firstOfMonthWeekday(
[int
$month = 0], [int
$year = 0])

Find the day of the week for the first of the month of given date

Return: number of weekday for the first day, 0=Sunday
Access: public

Parameters:

int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year

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array getCalendarMonth(
[int
$month = 0], [int
$year = 0], [string
$format = DATE_CALC_FORMAT])

Return a set of arrays to construct a calendar month for the given date

Access: public

Parameters:

int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year
string	`$format`	—	the string indicating how to format the output

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array getCalendarWeek(
[int
$day = 0], [int
$month = 0], [int
$year = 0], [string
$format = DATE_CALC_FORMAT])

Return an array with days in week

Access: public

Parameters:

int	`$day`	—	the day of the month, default is current local day
int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year
string	`$format`	—	the string indicating how to format the output

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array getCalendarYear(
[int
$year = 0], [string
$format = DATE_CALC_FORMAT])

Return a set of arrays to construct a calendar year for the given date

Access: public

Parameters:

int	`$year`	—	the year in four digit format, default current local year
string	`$format`	—	the string indicating how to format the output

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string getDay(
)

Returns the current local day in format DD

Return: the current day of the month in two digit format
Access: public

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string getMonth(
)

Returns the current local month in format MM

Return: the current month in two digit format
Access: public

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string getMonthAbbrname(
int
$month, [int
$length = 3])

Returns the abbreviated month name for the given month

Return: the abbreviated name of the month
See: Date_Calc::getMonthFullname
Access: public

Parameters:

int	`$month`	—	the month
int	`$length`	—	the length of abbreviation

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integer getMonthFromFullName(
string
$month)

Returns the numeric month from the month name or an abreviation

Both August and Aug would return 8.

Return: the month's number
Access: public

Parameters:

string $month — the name of the month to examine. Case insensitive.

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string getMonthFullname(
int
$month)

Returns the full month name for the given month

Return: the full name of the month
Access: public

Parameters:

int $month — the month

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array getMonthNames(
)

Returns an array of month names

Used to take advantage of the setlocale function to return language specific month names.

TODO: cache values to some global array to avoid preformace hits when called more than once.

Return: an array of month names
Access: public

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string getWeekdayAbbrname(
[int
$day = 0], [int
$month = 0], [int
$year = 0], [int
$length = 3])

Returns the abbreviated weekday name for the given date

Return: the abbreviated name of the day of the week
See: Date_Calc::getWeekdayFullname()
Access: public

Parameters:

int	`$day`	—	the day of the month, default is current local day
int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year
int	`$length`	—	the length of abbreviation

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string getWeekdayFullname(
[int
$day = 0], [int
$month = 0], [int
$year = 0])

Returns the full weekday name for the given date

Return: the full name of the day of the week
Access: public

Parameters:

int	`$day`	—	the day of the month, default is current local day
int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year

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array getWeekDays(
)

Returns an array of week days

Used to take advantage of the setlocale function to return language specific week days.

TODO: cache values to some global array to avoid preformace hits when called more than once.

Return: an array of week day names
Access: public

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string getYear(
)

Returns the current local year in format CCYY

Return: the current year in four digit format
Access: public

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string gregorianToISO(
int
$day, int
$month, int
$year)

Converts from Gregorian Year-Month-Day to ISO Year-WeekNumber-WeekDay

Uses ISO 8601 definitions. Algorithm by Rick McCarty, 1999 at http://personal.ecu.edu/mccartyr/ISOwdALG.txt . Transcribed to PHP by Jesus M. Castagnetto.

Return: the date in ISO Year-WeekNumber-WeekDay format
Access: public

Parameters:

int	`$day`	—	the day of the month
int	`$month`	—	the month
int	`$year`	—	the year. Use the complete year instead of the abbreviated version. E.g. use 2005, not 05. Do not add leading 0's for years prior to 1000.

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boolean isFutureDate(
int
$day, int
$month, int
$year)

Determines if given date is a future date from now

Access: public

Parameters:

int	`$day`	—	the day of the month
int	`$month`	—	the month
int	`$year`	—	the year. Use the complete year instead of the abbreviated version. E.g. use 2005, not 05. Do not add leading 0's for years prior to 1000.

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boolean isLeapYear(
[int
$year = 0])

Returns true for a leap year, else false

Access: public

Parameters:

int $year — the year. Use the complete year instead of the abbreviated version. E.g. use 2005, not 05. Do not add leading 0's for years prior to 1000.

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boolean isPastDate(
int
$day, int
$month, int
$year)

Determines if given date is a past date from now

Access: public

Parameters:

int	`$day`	—	the day of the month
int	`$month`	—	the month
int	`$year`	—	the year. Use the complete year instead of the abbreviated version. E.g. use 2005, not 05. Do not add leading 0's for years prior to 1000.

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boolean isValidDate(
int
$day, int
$month, int
$year)

Returns true for valid date, false for invalid date

Access: public

Parameters:

int	`$day`	—	the day of the month
int	`$month`	—	the month
int	`$year`	—	the year. Use the complete year instead of the abbreviated version. E.g. use 2005, not 05. Do not add leading 0's for years prior to 1000.

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int julianDate(
[int
$day = 0], [int
$month = 0], [int
$year = 0])

Returns number of days since 31 December of year before given date

Return: the julian date for the date
Access: public

Parameters:

int	`$day`	—	the day of the month, default is current local day
int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year

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string nextDay(
[int
$day = 0], [int
$month = 0], [int
$year = 0], [string
$format = DATE_CALC_FORMAT])

Returns date of day after given date

Return: the date in the desired format
Access: public

Parameters:

int	`$day`	—	the day of the month, default is current local day
int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year
string	`$format`	—	the string indicating how to format the output

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string nextDayOfWeek(
int
$dow, [int
$day = 0], [int
$month = 0], [int
$year = 0], [string
$format = DATE_CALC_FORMAT], [bool
$onOrAfter = false])

Returns date of the next specific day of the week from the given date

Return: the date in the desired format
Access: public

Parameters:

int	`$dow`	—	the day of the week (0 = Sunday)
int	`$day`	—	the day of the month, default is current local day
int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year
bool	`$onOrAfter`	—	if true and days are same, returns current day
string	`$format`	—	the string indicating how to format the output

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string nextDayOfWeekOnOrAfter(
int
$dow, [int
$day = 0], [int
$month = 0], [int
$year = 0], [string
$format = DATE_CALC_FORMAT])

Returns date of the next specific day of the week on or after the given date

Return: the date in the desired format
Access: public

Parameters:

int	`$dow`	—	the day of the week (0 = Sunday)
int	`$day`	—	the day of the month, default is current local day
int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year
string	`$format`	—	the string indicating how to format the output

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string nextWeekday(
[int
$day = 0], [int
$month = 0], [int
$year = 0], [string
$format = DATE_CALC_FORMAT])

Returns date of the next weekday of given date, skipping from Friday to Monday

Return: the date in the desired format
Access: public

Parameters:

int	`$day`	—	the day of the month, default is current local day
int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year
string	`$format`	—	the string indicating how to format the output

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string NWeekdayOfMonth(
int
$week, int
$dow, int
$month, int
$year, [string
$format = DATE_CALC_FORMAT])

Calculates the date of the Nth weekday of the month, such as the second Saturday of January 2000

Return: the date in the desired format
Access: public

Parameters:

int	`$week`	—	the number of the week to get (1 = first, etc. Also can be 'last'.)
int	`$dow`	—	the day of the week (0 = Sunday)
int	`$month`	—	the month
int	`$year`	—	the year. Use the complete year instead of the abbreviated version. E.g. use 2005, not 05. Do not add leading 0's for years prior to 1000.
string	`$format`	—	the string indicating how to format the output

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string prevDay(
[int
$day = 0], [int
$month = 0], [int
$year = 0], [string
$format = DATE_CALC_FORMAT])

Returns date of day before given date

Return: the date in the desired format
Access: public

Parameters:

int	`$day`	—	the day of the month, default is current local day
int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year
string	`$format`	—	the string indicating how to format the output

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string prevDayOfWeek(
int
$dow, [int
$day = 0], [int
$month = 0], [int
$year = 0], [string
$format = DATE_CALC_FORMAT], [bool
$onOrBefore = false])

Returns date of the previous specific day of the week from the given date

Return: the date in the desired format
Access: public

Parameters:

int	`$day`	—	the day of the month, default is current local day
int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year
bool	`$onOrBefore`	—	if true and days are same, returns current day
string	`$format`	—	the string indicating how to format the output
int	`$dow`	—	day of week, 0=Sunday

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string prevDayOfWeekOnOrBefore(
int
$dow, [int
$day = 0], [int
$month = 0], [int
$year = 0], [string
$format = DATE_CALC_FORMAT])

Returns date of the previous specific day of the week on or before the given date

Return: the date in the desired format
Access: public

Parameters:

int	`$dow`	—	the day of the week (0 = Sunday)
int	`$day`	—	the day of the month, default is current local day
int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year
string	`$format`	—	the string indicating how to format the output

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string prevWeekday(
[int
$day = 0], [int
$month = 0], [int
$year = 0], [string
$format = DATE_CALC_FORMAT])

Returns date of the previous weekday, skipping from Monday to Friday

Return: the date in the desired format
Access: public

Parameters:

int	`$day`	—	the day of the month, default is current local day
int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year
string	`$format`	—	the string indicating how to format the output

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int quarterOfYear(
[int
$day = 0], [int
$month = 0], [int
$year = 0])

Returns quarter of the year for given date

Return: the number of the quarter in the year
Access: public

Parameters:

int	`$day`	—	the day of the month, default is current local day
int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year

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int weekOfYear(
[int
$day = 0], [int
$month = 0], [int
$year = 0])

Returns week of the year, first Sunday is first day of first week

Return: the number of the week in the year
Access: public

Parameters:

int	`$day`	—	the day of the month, default is current local day
int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year

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int weeksInMonth(
[int
$month = 0], [int
$year = 0])

Returns the number of rows on a calendar month

Useful for determining the number of rows when displaying a typical month calendar.

Return: the number of weeks the month has
Access: public

Parameters:

int	`$month`	—	the month, default is current local month
int	`$year`	—	the year in four digit format, default is current local year

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Class: Date_Calc

Class Overview

Author(s):

Version:

Copyright:

Methods

Inherited Variables

Inherited Methods

Class Details

Method Detail

beginOfMonth [line 1397]

Parameters:

beginOfMonthBySpan [line 1577]

Parameters:

beginOfNextMonth [line 1498]

Parameters:

beginOfNextWeek [line 1357]

Parameters:

beginOfPrevMonth [line 1423]

Parameters:

beginOfPrevWeek [line 1315]

Parameters:

beginOfWeek [line 1247]

Parameters:

compareDates [line 1918]

Parameters:

dateDiff [line 1886]

Parameters:

dateFormat [line 119]

Parameters:

dateNow [line 437]

Parameters:

dateSeason [line 384]

Parameters:

dateToDays [line 231]

Parameters:

dayOfWeek [line 691]

Parameters:

daysInMonth [line 786]

Parameters:

daysToDate [line 264]

Parameters:

defaultCentury [line 205]

Parameters:

endOfMonthBySpan [line 1634]

Parameters:

endOfNextMonth [line 1536]

Parameters:

endOfPrevMonth [line 1461]

Parameters:

endOfWeek [line 1281]

Parameters:

firstOfMonthWeekday [line 1684]

Parameters:

getCalendarMonth [line 901]

Parameters:

getCalendarWeek [line 863]

Parameters:

getCalendarYear [line 952]

Parameters:

getDay [line 476]

getMonth [line 463]

getMonthAbbrname [line 601]

Parameters:

getMonthFromFullName [line 623]

Parameters:

getMonthFullname [line 579]

Parameters:

getMonthNames [line 649]

getWeekdayAbbrname [line 554]

Parameters:

getWeekdayFullname [line 524]

Parameters:

getWeekDays [line 671]

getYear [line 450]

gregorianToISO [line 312]

Parameters:

isFutureDate [line 1812]

Parameters:

isLeapYear [line 1778]