Calculating start and end dates of a week.
A friend asked "How do I calculate start (monday) and end (sunday) dates from a given week number for a specified year?" Instead of having to come up with your own algorithm you can simply do the following in PHP 5.1 and higher:
<?php
// Monday
echo date(
datetime::ISO8601,
strtotime("2006W37"));
// Sunday
echo date(
datetime::ISO8601,
strtotime("2006W377"));
?>
The format is " year 'W' weeknr ( daynr )?" where the default daynr is 1 being the Monday of that week. The daynr can be in the range 0 to 7. The weeknr is the ISO week number . Please note that the " year '-W' weeknr ( '-' daynr )?" format is only supported in PHP 5.2 and higher.
Comments
Thanks Derek, that is going to make life a lot easier!
Keep it simple and just do strtotime('-1 Sunday',$currentDay);
it is simpler and uses less resources.
or you could use PEAR::Date(), it makes it very easy as well
@Ammar: Why would you want to use a wrapper class in PHP when the extension supports it?
Hey Dereck
thanks for confirming yet again why I love the Internet... I've been playing around with this particular problem for the last few days... any solution I had was not nearly as elegant and simple as this... glad I found this posting...will help tremendously.
echo date("Y-m-d", strtotime(date("Y").'W'.date('W')."7"));
If 1 for daynr represents monday, what does 0 represent? How can it accept values 0-7?
Thnx! Just what I was looking for!
Thank you very much!
Excellent example of exactly what a lot of people need. Please keep this example up for the rest of the PHP newbs like me!
You have just saved me a lot of time on deadline day at work.
Thanks!
Thank you very much. This threat was my first search result: "php calculate start end week"..
Wow. I had no clue about this. Thanks, man!
Very very usefull, I knew about the W weeks implemented in recent php but this is pretty useful, saved me on a thing I have to do at work :)
Excellent...!
Exactly what I was looking for.
Even in 2013 this is very useful, thanks! Saved me much work
Thank you! I was getting very frustrated trying to get my dates to format properly, you're a lifesaver!
Life Line
After two busy days doing elections stuff, I spent yesterday looking at birds, in a nature reserve to relax and recharge.
I saw some cracking birds, with these being my favourite shots.
#BirdPhotography #photography #BirdsOfMastodon #Nature #London
Updated a restaurant
Updated 3 bird_hides; Confirmed 2 informations and a toilet
I walked 7.0km in 3h10m47s
This map was mostly red yesterday.
I'm glad we managed to win all the wards we've targeted.
However, no overall control, and two parties with the same amount of seats in second place.
I walked 2.2km in 41m46s
I walked 1.9km in 19m17s
I've spend most of my time outside polling telling today, taking down poll card numbers so we don't need to chase people up to go vote.
I have made several observations:
Updated a restaurant
I walked 12.1km in 2h3m04s
I walked 1.1km in 9m46s
I walked 1.2km in 10m31s
Updated a waste_basket
Created 11 benches, 2 life_rings, and 3 other objects; Updated 8 benches and a waste_basket; Deleted a bench and a log; Confirmed a cafe
I walked 7.8km in 1h52m27s
Tomorrow we have elections in the UK!
Lots of local authorities, all London Councils, the Welsh Senedd, and the Scottish Parliament.
Don't forget to vote if you have the right.
I get to vote for myself again 😎.
Benches, and corrections for the QE II Gardens
Addresses on College Road
Created 2 main entrances and an entrance; Updated an entrance, a residential building, and a house building
Created an apartments building and a main entrance
I walked 9.5km in 2h21m10s
Created a waste_basket
I walked 6.6km in 1h13m23s
On my walk from Aylesbury to Princes Risborough I spotted a few new bird species. I didn't get all the best photos though!
A Common Buzzard, a Yellow Wagtail, a Greater White throat, and a Green Woodpecker.
#photography #Birds #BirdPhotogaphy #BirdsOfMastodon #nature #Buckinghamshire
Updated an alcohol shop
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