1. Session 3BBK P1 Module05-May-2007 : [‹#›] Date Manipulation

2. Session 3BBK P1 Module05-May-2007 : [‹#›] Unix Epoch..? The easiest way to handle dates in PHP is using UNIX timestamps. A UNIX timestamp is the number of seconds since the UNIX Epoch. The Epoch is 1 st Jan 1970 00:00 GMT.

3. Session 3BBK P1 Module05-May-2007 : [‹#›] Get current time Use the time() function to get current or relative time. <?php $now = time(); $nextWeek = time() + (7 * 24 * 60 * 60); // 7 days; 24 hours; 60 mins; 60secs ?>

4. Session 3BBK P1 Module05-May-2007 : [‹#›] Display a time.. To display a time use the date() function along with a format string. <?php $nextWeek = time() + (7*24*60*60); echo ‘Next week: ‘; echo date(‘d-m-Y’,$now).’ ’; ?> Format strings: http://php.net/manual/en/function.date.phphttp://php.net/manual/en/function.date.php

5. Session 3BBK P1 Module05-May-2007 : [‹#›] String to timestamp To convert a string to date, use strtotime() <?php echo strtotime("now"); echo strtotime("10 September 2000"); echo strtotime("+1 day"); echo strtotime("+1 week"); echo strtotime("next Thursday"); echo strtotime("last Monday"); ?>

6. Session 3BBK P1 Module05-May-2007 : [‹#›] String to timestamp Note that strtotime() assume a US date format on string such as mm/dd/yyyy, so some modifications may be required.

7. Session 3BBK P1 Module05-May-2007 : [‹#›] What about dates before 1970? Negative timestamps are not consistently supported in PHP. Therefore we cannot use timestamps when using dates that might be before 1970.

8. Session 3BBK P1 Module05-May-2007 : [‹#›] The full information.. http://php.net/manual/en/ref.datetime.php We have looked at a sub-selection of this information. If you want to do something with dates.. This is the place to start looking.

9. Session 3BBK P1 Module05-May-2007 : [‹#›] HOE 7 : Handling Dates

10. Session 3BBK P1 Module05-May-2007 : [‹#›] Review Know what an integer UNIX date is. Can manipulate dates in PHP: creating, displaying, parsing from string data.