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Top Forums UNIX for Advanced & Expert Users Friendz.. plz help me on this date function. Post 302216509 by drl on Saturday 19th of July 2008 05:01:45 PM
Old 07-19-2008
Hi, pchang.
Quote:
Originally Posted by pchang
aix...

please provide example of GNU's date utility regardless and this might give me a clue.

Thank you.
Here are a few phrases date can understand and one that it cannot:
Code:
#!/bin/bash -

# @(#) s1       Demonstrate GNU date flexibility.

head -1 /etc/issue.net

echo
echo "(Versions displayed with local utility \"version\")"
version >/dev/null 2>&1 && version =o $(_eat $0 $1) date
set -o nounset
echo

echo " GNU date with English-like expressions:"
echo

date --date="2 weeks ago"
date --date="two weeks ago"

echo
date --date="today + 1 month"
date --date="3 years + 2 days"

exit 0

Producing:
Code:
$ ./s1
CentOS release 5 (Final)

(Versions displayed with local utility "version")
Linux 2.6.18-53.1.13.el5vm
GNU bash 3.1.17
date (GNU coreutils) 5.97

 GNU date with English-like expressions:

Sat Jul  5 15:55:46 CDT 2008
date: invalid date `two weeks ago'

Tue Aug 19 15:55:46 CDT 2008
Thu Jul 21 15:55:46 CDT 2011

As you can see, GNU date is extremely flexible.

I don't have access to an AIX box, but I suggest you look over man date to see if it has anything close ... cheers, drl
 

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DATETIME.__CONSTRUCT(3) 						 1						   DATETIME.__CONSTRUCT(3)

DateTime::__construct - Returns new DateTime object

       Object oriented style

SYNOPSIS
public DateTime::__construct NULL ([string $time = "now"], [DateTimeZone $timezone]) DESCRIPTION
Procedural style DateTime date_create NULL ([string $time = "now"], [DateTimeZone $timezone]) Returns new DateTime object. PARAMETERS
o $time -A date/time string. Valid formats are explained in Date and Time Formats. Enter NULL here to obtain the current time when using the $timezone parameter. o $timezone - A DateTimeZone object representing the timezone of $time. If $timezone is omitted, the current timezone will be used. Note The $timezone parameter and the current timezone are ignored when the $time parameter either is a UNIX timestamp (e.g. @946684800) or specifies a timezone (e.g. 2010-01-28T15:00:00+02:00). RETURN VALUES
Returns a new DateTime instance. Procedural style returns FALSE on failure. ERRORS
/EXCEPTIONS Emits Exception in case of an error. CHANGELOG
+--------+---------------------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------------------+ | 5.3.0 | | | | | | | If $time contains an invalid date/time format, | | | then an exception is now thrown. Previously an | | | error was emitted. | | | | +--------+---------------------------------------------------+ EXAMPLES
Example #1 DateTime.__construct(3) example Object oriented style <?php try { $date = new DateTime('2000-01-01'); } catch (Exception $e) { echo $e->getMessage(); exit(1); } echo $date->format('Y-m-d'); ?> Procedural style <?php $date = date_create('2000-01-01'); if (!$date) { $e = date_get_last_errors(); foreach ($e['errors'] as $error) { echo "$error "; } exit(1); } echo date_format($date, 'Y-m-d'); ?> The above examples will output: 2000-01-01 Example #2 Intricacies of DateTime.__construct(3) <?php // Specified date/time in your computer's time zone. $date = new DateTime('2000-01-01'); echo $date->format('Y-m-d H:i:sP') . " "; // Specified date/time in the specified time zone. $date = new DateTime('2000-01-01', new DateTimeZone('Pacific/Nauru')); echo $date->format('Y-m-d H:i:sP') . " "; // Current date/time in your computer's time zone. $date = new DateTime(); echo $date->format('Y-m-d H:i:sP') . " "; // Current date/time in the specified time zone. $date = new DateTime(null, new DateTimeZone('Pacific/Nauru')); echo $date->format('Y-m-d H:i:sP') . " "; // Using a UNIX timestamp. Notice the result is in the UTC time zone. $date = new DateTime('@946684800'); echo $date->format('Y-m-d H:i:sP') . " "; // Non-existent values roll over. $date = new DateTime('2000-02-30'); echo $date->format('Y-m-d H:i:sP') . " "; ?> The above example will output something similar to: 2000-01-01 00:00:00-05:00 2000-01-01 00:00:00+12:00 2010-04-24 10:24:16-04:00 2010-04-25 02:24:16+12:00 2000-01-01 00:00:00+00:00 2000-03-01 00:00:00-05:00 SEE ALSO
DateTime.createFromFormat(3), DateTimeZone.__construct(3), Date and Time Formats, date.timezone ini setting, date_default_time- zone_set(3), DateTime.getLastErrors(3), checkdate(3). PHP Documentation Group DATETIME.__CONSTRUCT(3)
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