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Top Forums UNIX for Dummies Questions & Answers How to find last sunday (date) using perl? Post 302170723 by joeyg on Tuesday 26th of February 2008 02:39:18 PM
Old 02-26-2008
Hammer & Screwdriver One solution

Here is the script
($dow is the variable for day-of-week, stored at location [6] from localtime)

Code:
> cat sunday
#!/usr/bin/perl

# start of Perl
# Program to find previous Sunday date
#
# use strict;

 $today = date(time);
 $weekend = date2(time);

# start of subroutine date MM-DD-YYYY
sub date 
{
     my($time) = @_;     # incoming parameters

     @when = localtime($time);
     $dow=$when[6];
     $when[5]+=1900;
     $when[4]++;
     $date = $when[4] . "-" . $when[3] . "-" . $when[5];

     return $date;
}

# start of subroutine date2 MM-DD-YYYY
sub date2
{
     my($time) = @_;     # incoming parameters

     $offset = 0;
     $offset = 60*60*24*$dow;
     @when = localtime($time - $offset);
     $when[5]+=1900;
     $when[4]++;
     $date = $when[4] . "-" . $when[3] . "-" . $when[5];

     return $date;
}

print "$today \n";
print "$dow \n";
print "$weekend \n";

Here is the output
Code:
> sunday
2-26-2008 
2 
2-24-2008

 

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DATETIME.SETISODATE(3)							 1						    DATETIME.SETISODATE(3)

DateTime::setISODate - Sets the ISO date

       Object oriented style

SYNOPSIS
public DateTime DateTime::setISODate (int $year, int $week, [int $day = 1]) DESCRIPTION
Procedural style DateTime date_isodate_set (DateTime $object, int $year, int $week, [int $day = 1]) Set a date according to the ISO 8601 standard - using weeks and day offsets rather than specific dates. 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 $week - Week of the date. o $day - Offset from the first day of the week. 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.setISODate(3) example Object oriented style <?php $date = new DateTime(); $date->setISODate(2008, 2); echo $date->format('Y-m-d') . " "; $date->setISODate(2008, 2, 7); echo $date->format('Y-m-d') . " "; ?> Procedural style <?php $date = date_create(); date_isodate_set($date, 2008, 2); echo date_format($date, 'Y-m-d') . " "; date_isodate_set($date, 2008, 2, 7); echo date_format($date, 'Y-m-d') . " "; ?> The above examples will output: 2008-01-07 2008-01-13 Example #2 Values exceeding ranges are added to their parent values <?php $date = new DateTime(); $date->setISODate(2008, 2, 7); echo $date->format('Y-m-d') . " "; $date->setISODate(2008, 2, 8); echo $date->format('Y-m-d') . " "; $date->setISODate(2008, 53, 7); echo $date->format('Y-m-d') . " "; ?> The above example will output: 2008-01-13 2008-01-14 2009-01-04 Example #3 Finding the month a week is in <?php $date = new DateTime(); $date->setISODate(2008, 14); echo $date->format('n'); ?> The above examples will output: 3 SEE ALSO
DateTime.setDate(3), DateTime.setTime(3). PHP Documentation Group DATETIME.SETISODATE(3)
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