VI. Calendar Functions
简介
The calendar extension presents a series of functions to simplify converting between different calendar formats. The intermediary or standard it is based on is the Julian Day Count. The Julian Day Count is a count of days starting from January 1st, 4713 B.C. To convert between calendar systems, you must first convert to Julian Day Count, then to the calendar system of your choice. Julian Day Count is very different from the Julian Calendar! For more information on Julian Day Count, visit http://www.hermetic.ch/cal_stud/jdn.htm. For more information on calendar systems visit http://www.boogle.com/info/cal-overview.html. Excerpts from this page are included in these instructions, and are in quotes.
安装
To get these functions to work, you have to compile PHP with --enable-calendar.
PHP 的 Windows 版本已经内置该扩展模块的支持。您无需加载任何附加的扩展库即可使用这些函数。
运行时配置
该扩展模块未定义任何设置指令。
资源类型
该扩展模块未定义任何资源类型。
预定义常量
由于这些常量是由该扩展模块定义的，因此只有在该扩展模块被编译到 PHP 中，或者在运行时被动态加载后，这些常量才有效。
- CAL_GREGORIAN (integer)
- CAL_JULIAN (integer)
- CAL_JEWISH (integer)
- CAL_FRENCH (integer)
- CAL_NUM_CALS (integer)
- CAL_DOW_DAYNO (integer)
- CAL_DOW_SHORT (integer)
- CAL_DOW_LONG (integer)
- CAL_MONTH_GREGORIAN_SHORT (integer)
- CAL_MONTH_GREGORIAN_LONG (integer)
- CAL_MONTH_JULIAN_SHORT (integer)
- CAL_MONTH_JULIAN_LONG (integer)
- CAL_MONTH_JEWISH (integer)
- CAL_MONTH_FRENCH (integer)
The following constants are available since PHP 4.3.0 :
The following constants are available since PHP 5.0.0 :
- 目录
- cal_days_in_month -- Return the number of days in a month for a given year and calendar
- cal_from_jd -- Converts from Julian Day Count to a supported calendar
- cal_info -- Returns information about a particular calendar
- cal_to_jd -- Converts from a supported calendar to Julian Day Count
- easter_date -- Get Unix timestamp for midnight on Easter of a given year
- easter_days -- Get number of days after March 21 on which Easter falls for a given year
- FrenchToJD -- Converts a date from the French Republican Calendar to a Julian Day Count
- GregorianToJD -- Converts a Gregorian date to Julian Day Count
- JDDayOfWeek -- Returns the day of the week
- JDMonthName -- Returns a month name
- JDToFrench -- Converts a Julian Day Count to the French Republican Calendar
- JDToGregorian -- Converts Julian Day Count to Gregorian date
- jdtojewish -- Converts a Julian day count to a Jewish calendar date
- JDToJulian -- Converts a Julian Day Count to a Julian Calendar Date
- jdtounix -- Convert Julian Day to Unix timestamp
- JewishToJD -- Converts a date in the Jewish Calendar to Julian Day Count
- JulianToJD -- Converts a Julian Calendar date to Julian Day Count
- unixtojd -- Convert Unix timestamp to Julian Day