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Full Discussion: Date comparisons
Top Forums UNIX for Dummies Questions & Answers Date comparisons Post 302776719 by Corona688 on Wednesday 6th of March 2013 05:36:18 PM
Old 03-06-2013
Quote:
Originally Posted by jawsnnn
My question however was : isn't there a way to do the equivalent of sysdate - 365 (sql) in unix... Or even simply get a value of the date time as it is actually stored (i read somewhere that it is stored as the number of seconds since 1970). That would help too
That's a blind spot. It's sad to say it, but the only truly portable way to do date math in UNIX is Perl.

GNU date is fantastic if you have it:

Code:
$ date -d "today - 1 day" +%Y-%m-%d

2013-03-05

$

...but on AIX or Solaris or anything-but-Linux that's a third-party utility. It's such an obvious feature to put in the date command that people who script in Linux often assume it's everywhere, but it's not. GNU awk has some extended date features too.

Last edited by Corona688; 03-06-2013 at 06:42 PM..
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DATETIME.SETDATE(3)							 1						       DATETIME.SETDATE(3)

DateTime::setDate - Sets the date

       Object oriented style

SYNOPSIS
public DateTime DateTime::setDate (int $year, int $month, int $day) DESCRIPTION
Procedural style DateTime date_date_set (DateTime $object, int $year, int $month, int $day) Resets the current date of the DateTime object to a different date. PARAMETERS
o $object -Procedural style only: A DateTime object returned by date_create(3). The function modifies this object. o $year - Year of the date. o $month - Month of the date. o $day - Day of the date. RETURN VALUES
Returns the DateTime object for method chaining or FALSE on failure. CHANGELOG
+--------+---------------------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------------------+ | 5.3.0 | | | | | | | Changed the return value on success from NULL to | | | DateTime. | | | | +--------+---------------------------------------------------+ EXAMPLES
Example #1 DateTime.setDate(3) example Object oriented style <?php $date = new DateTime(); $date->setDate(2001, 2, 3); echo $date->format('Y-m-d'); ?> Procedural style <?php $date = date_create(); date_date_set($date, 2001, 2, 3); echo date_format($date, 'Y-m-d'); ?> The above examples will output: 2001-02-03 Example #2 Values exceeding ranges are added to their parent values <?php $date = new DateTime(); $date->setDate(2001, 2, 28); echo $date->format('Y-m-d') . " "; $date->setDate(2001, 2, 29); echo $date->format('Y-m-d') . " "; $date->setDate(2001, 14, 3); echo $date->format('Y-m-d') . " "; ?> The above example will output: 2001-02-28 2001-03-01 2002-02-03 SEE ALSO
DateTime.setISODate(3), DateTime.setTime(3). PHP Documentation Group DATETIME.SETDATE(3)
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