php - number of calendaristic weeks betwen 2 dates

Question

I want to measure the number of weeks between 2 dates.

For example between 13-12-2015 and 14-12-2015 the function should return 2 weeks, because first date it's Sunday and second date it's Monday, so it's 2 different weeks.

This has to work with different year dates, and here is what I tried:

$d1= new \DateTime('2014-10-14');
$d2= new \DateTime('2015-12-15');
echo $d2->diff($d1)/7;

The result is 61, but in reality it should be 62.

Any tips?

well between 13-12-2015 and 14-12-2015 is only 1 day difference, but they are 2 different weeks, so your afrimation is not valid: 1/7 =2 — Speedwheelftw, Dec 15 '15 at 18:16
Possible duplicate of [php weeks between 2 dates](http://stackoverflow.com/questions/3028491/php-weeks-between-2-dates) — Sergey Belyakov, Dec 15 '15 at 18:33

Hemant Maurya · Answer 1 · 2015-12-15T18:32:22.910

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   echo datediff('ww', '9 July 2003', '4 March 2004', false);

datediff function you can find in following link...

Click here to see Week Difference function link

edited Dec 15 '15 at 18:32

answered Dec 15 '15 at 18:19

Hemant Maurya

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it still returns 61, it calculates the days, not the actual weeks. – Speedwheelftw Dec 15 '15 at 18:25
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Answer fully duplicated http://stackoverflow.com/questions/3028491/php-weeks-between-2-dates – Sergey Belyakov Dec 15 '15 at 18:31
@SergeyBelyakov yaaa bro... I accept... please vote it down. if you want. :P – Hemant Maurya Dec 15 '15 at 18:35

Speedwheelftw · Answer 2 · 2015-12-15T21:50:26.720

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I managed to do it on my own finally, here is the code:

$a1 = date('W', strtotime('2015-12-13'));
$a2 = date('Y', strtotime('2015-12-13'));

$b1 = date('W', strtotime('2015-12-14'));
$b2 = date('Y', strtotime('2015-12-14'));

echo $b2 * 52 + $b1 - $a2 * 52 - $a1 +1;

Result:

P.S. I don't know why everybody is spamming that is duplicate, when obviously it isn't.

edited Dec 15 '15 at 21:50

answered Dec 15 '15 at 21:45

Speedwheelftw

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php - number of calendaristic weeks betwen 2 dates

2 Answers2