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Get week number from date

   Frihost Forum Index -> Scripting -> Php and MySQL
 


devroom
I have searched for hours for a code but i couldnt find one. Does anybody knows or has a code which can calculate a code from a date
example

date: 30/11/2006 <- enter date
[get week] <-button
week: .... <-gives the weeknumber

Thx and grtz

Ps. for the moderators. I have also created a topic in the script-forum. Because there can be 2 ways.
hexkid
devroom wrote:
date: 30/11/2006 <- enter date
[get week] <-button
week: .... <-gives the weeknumber


date()
Code:
<?php
$date = mktime(0, 0, 0, 11, 30, 2006);
$week = (int)date('W', $date);
?>
devroom
hexkid wrote:
devroom wrote:
date: 30/11/2006 <- enter date
[get week] <-button
week: .... <-gives the weeknumber


date()
Code:
<?php
$date = mktime(0, 0, 0, 11, 30, 2006);
$week = (int)date('W', $date);
?>


Thx for the reply, but it isnt working proparly:
Code:
<?php
$date = mktime(0, 0, 0, 01, 01, 2006);
$week = (int)date('W', $date);
echo "Weeknummer: ".$week;
?>

January 1 2006 gives weeknumber 52. So far i know its number 1 Cool
Maybe im doing something wrong?
muggle
devroom wrote:
January 1 2006 gives weeknumber 52. So far i know its number 1 Cool
Maybe im doing something wrong?

Yes, you miss something. January 1, 2006 is Sunday. According the description of a date() function http://ca.php.net/manual/en/function.date.php
Quote:
W ISO-8601 week number of year, weeks starting on Monday (added in PHP 4.1.0)

it's in fact the latest week in the 2005, so the answer is correct.
hexkid
devroom wrote:
January 1 2006 gives weeknumber 52.

muggle already answered you.

But you have another option: get the date for the start of the year, get the date you want, subtract, divide by a week in seconds (7 * 24 * 60 * 60), adjust result.
Code:
<?php
$year = 2006;
$Jan1 = gmmktime(0, 0, 0, 1, 1, $year);
$mydate = gmmktime(0, 0, 0, 11, 30, $year);
$delta = (int)(($mydate - $Jan1) / (7 * 24 * 60 * 60)) + 1;
echo 'weeknumber: ', $delta;
?>

Notice I used gmmktime() to avoid possible (though unlikely) errors due to daylight savings time.
devroom
Thx all for your reply's. But i would rather have it in javascript Cool
Because then the weeknummer can be changed instantly

If its possible in javascript please help me out http://www.frihost.com/forums/vt-49453.html

If it is not possble also thx and ill will use the php Very Happy
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