How To Find All Weeks First date and Last date?

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• Author
• Posted on
Hi,

I want to find All no of week in any month.
And first and last date of that week.

Assume Month is Jan 2011

date in Y-m-d
1st week -> Start date=2011-01-01 End date=2011-01-01
2nd week -> Start date=2011-01-02 End date=2011-01-08
3rd week -> Start date=2011-01-09 End date=2011-01-15
4th week -> Start date=2011-01-16 End date=2011-01-22
5th week -> Start date=2011-01-23 End date=2011-01-29
6th week -> Start date=2011-01-30 End date=2011-01-31

Re: How To Find All Weeks First date and Last date?

On 09-06-2011 14:25, Amit Pawar wrote:

\$d=mktime (0,0,0,1,1,2011);
for (\$i=0; \$i<35; \$i++) {
\$x=\$d+(\$i*24*3600);
if (date("w",\$x)==0) {
print date("W d-m", \$x).date(" d-m\n", \$x+(6*24*3600));
}
}

You need to change this in order to get it to work ;)

--
Luuk

Re: How To Find All Weeks First date and Last date?

On 6/9/2011 8:25 AM, Amit Pawar wrote:

First of all, what day does your week start on?  Sunday, from the looks
of it, but need to be sure.

Next, most calendars would consider that since Jan 1 is on a Saturday,
that is part of the last week of 2010, and the first week of 2010 would
start on Jan 2.

So first you need to find the first Sunday. This is pretty easy to do by
getting the day of week for 2011-01-01 as a number (1-7 for
Monday-Sunday).  See date() for DateTime::format() with the 'N' format.

From there it's a simple matter to get the end of the week by adding 6
days (DateInteral object).  You can then get the start of the next week
by either adding 1 day to the end of the week or 7 days to the start
of the previous week.

Not too hard if you look up the DateTime object in the manual.  It
contains all the references you need.  See
http://us.php.net/manual/en/class.datetime.php .

(Note: adding 60*60*24*7 seconds will be off by one hour for 1/2 the
year if you run Daylight Savings Time in the summer - not necessarily a
problem if you only are interested in dates).

--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attglobal.net
==================

Re: How To Find All Weeks First date and Last date?

On Thu, 09 Jun 2011 20:03:30 -0400, in comp.lang.php Jerry Stuckle

Just to add to Jerry's post:
The problem of Daylight Saving Time can be corrected by making sure
that the time is set to midday not midnight i.e.
<?php
\$Aday = 60 * 60 * 24;
\$dt = strtotime('2011-01-01 12:00:00');
for( \$x=0; \$x<53; \$x++ ) {
echo date ( "W w Y-m-d", \$dt  )."<br>";