DateFormat PHP Class (php 处理日期)

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                 format character           Description           Example returned values          Day------dDay of the month, 2 digits with leading zeros01 to 31DA textual representation of a day, three lettersMon through SunjDay of the month without leading zeros1 to 31l (lowercase 'L')A full textual representation of the day of the weekSunday through SaturdayNISO-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 characters            st, 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 365Week------WISO-8601 week number of year, weeks starting on Monday (added in PHP 4.1.0)Example: 42 (the 42nd week in the year)Month------FA full textual representation of a month, such as January or MarchJanuary through DecembermNumeric representation of a month, with leading zeros01 through 12MA short textual representation of a month, three lettersJan through DecnNumeric representation of a month, without leading zeros1 through 12tNumber of days in the given month28 through 31Year------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 2003YA full numeric representation of a year, 4 digitsExamples: 1999 or 2003yA two digit representation of a yearExamples: 99 or 03Time------aLowercase Ante meridiem and Post meridiemam or pmAUppercase Ante meridiem and Post meridiemAM or PMBSwatch Internet time000 through 999g12-hour format of an hour without leading zeros1 through 12G24-hour format of an hour without leading zeros0 through 23h12-hour format of an hour with leading zeros01 through 12H24-hour format of an hour with leading zeros00 through 23iMinutes with leading zeros00 to 59sSeconds, with leading zeros00 through 59uMicroseconds (added in PHP 5.2.2)Example: 654321Timezone------eTimezone identifier (added in PHP 5.1.0)Examples: UTC, GMT, Atlantic/AzoresI (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: +0200PDifference to Greenwich time (GMT) with colon between hours and minutes (added in PHP 5.1.3)Example: +02:00TTimezone 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 50400Full Date/Time------cISO 8601 date (added in PHP 5)2004-02-12T15:19:21+00:00r??RFC 2822 formatted dateExample: Thu, 21 Dec 2000 16:01:07 +0200USeconds since the Unix Epoch (January 1 1970 00:00:00 GMT)See also  time()
       Unrecognized characters in the format string will be printed       as-is.  The Z format will always return       0 when using  gmdate().      
Note:        
        Since this function only accepts integer timestamps the        u format character is only useful when using the         date_format() function with user based timestamps        created with  date_create().       
timestamp
The optional timestamp parameter is aninteger Unix timestamp that defaults to the currentlocal time if a timestamp is not given. In otherwords, it defaults to the value of  time().
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