Week number within year

Anyone know if there is an existing way to identify the weeknumber within a year?

Say a date of 9/1/2001 is within week number 40 of the year (or whatever it is)

I can't seem to locate one.....

Thanks.

mcal_week_of_year ( int day, int month, int year)

I did find a strftime("%U") in the manual, however I am trying to utilize this in combination of a date.

When I add a date after the "%U" it returns 52 regardless.

See below:
$weeknum = strftime("%U", 3/2/2002);

This should return 8, but returns 52.

I want to use a variable for the date, but have not explored that since cannot the above to work correctly.

Appreciate any input...

Thanks!

Thats because date() and strftime want a unix timestamp as optional data.
Try this:
echo strftime("%U", mktime(0,0,0,3,2,2002));

Howdy!

I tried the mcal_week_of_year() and get an E_ERROR call to undefined function....

Is this supported in certain versions and fairly new?? Confused....

Would be very cool and make life easier if I could get to work!!

Thanks.

Howdy!

I tried the mcal_week_of_year() and get an E_ERROR undefined function....

Is this supported in certain versions and fairly new?? Confused....

Would be very cool and make life easier if I could get to work!!

Thanks.

I'll give the UNIX timestamp a shot, thanks for the info!

Very cool!! Works great! Thanks!!!

$newyear = date("Y");
$dayofweek = date("d");
$nmonth = date("m");

$weeknum = strftime("%U", mktime(0,0,0,$nmonth,$dayofweek,$newyear));

$selectyr = $weeknum . $newyear;
echo $selectyr;

this should work for (PHP 4 >= 4.0.0)

Regards,
Rik

Just for cosmetics, date("d") is day in month, not day in week, that would be something else 🙂