php中DateTime的format格式以及 TtoDatetime函数

Definition and Usage

The date() function formats a local time/date.

Syntaxdate(format,timestamp)
ParameterDescriptionformat Required. Specifies how to return the result:

• d - The day of the month (from 01 to 31)
• D - A textual representation of a day (three letters)
• j - The day of the month without leading zeros (1 to 31)
• l (lowercase ‘L‘) - A full textual representation of a day
• N - The ISO-8601 numeric representation of a day (1 for Monday through 7 for Sunday)
• S - The English ordinal suffix for the day of the month (2 characters st, nd, rd or th. Works well with j)
• w - A numeric representation of the day (0 for Sunday through 6 for Saturday)
• z - The day of the year (from 0 through 365)
• W - The ISO-8601 week number of year (weeks starting on Monday)
• F - A full textual representation of a month (January through December)
• m - A numeric representation of a month (from 01 to 12)
• M - A short textual representation of a month (three letters)
• n - A numeric representation of a month, without leading zeros (1 to 12)
• t - The number of days in the given month
• L - Whether it‘s a leap year (1 if it is a leap year, 0 otherwise)
• o - The ISO-8601 year number
• Y - A four digit representation of a year
• y - A two digit representation of a year
• a - Lowercase am or pm
• A - Uppercase AM or PM
• B - Swatch Internet time (000 to 999)
• g - 12-hour format of an hour (1 to 12)
• G - 24-hour format of an hour (0 to 23)
• h - 12-hour format of an hour (01 to 12)
• H - 24-hour format of an hour (00 to 23)
• i - Minutes with leading zeros (00 to 59)
• s - Seconds, with leading zeros (00 to 59)
• e - The timezone identifier (Examples: UTC, Atlantic/Azores)
• I (capital i) - Whether the date is in daylights savings time (1 if Daylight Savings Time, 0 otherwise)
• O - Difference to Greenwich time (GMT) in hours (Example: +0100)
• T - Timezone setting of the PHP machine (Examples: EST, MDT)
• Z - Timezone offset in seconds. The offset west of UTC is negative, and the offset east of UTC is positive (-43200 to 43200)
• c - The ISO-8601 date (e.g. 2004-02-12T15:19:21+00:00)
• r - The RFC 2822 formatted date (e.g. Thu, 21 Dec 2000 16:01:07 +0200)
• U - The seconds since the Unix Epoch (January 1 1970 00:00:00 GMT)

timestampOptional.

example:

  function TtoDatetime($text){
        $myDatetimeStr=Date(‘Y‘,strtotime($text))."-".Date(‘m‘,strtotime($text))."-".Date(‘d‘,strtotime($text))." ".Date(‘H‘,strtotime($text)).":".Date(‘i‘,strtotime($text)).":".Date(‘s‘,strtotime($text));
        return $myDatetimeStr;
       }

echo $text;

echo TtoDatetime($text);

result:

"01/07/2012 13:44",2012-01-07 13:44:00