Get first/last day of week in php?

Question

With get the date of the first day of the week and last day of the week in php, first day Monday and the last day Friday, for example I have the date 2017-05-23 and I want to know the Monday one 2017-05-22 and the last one that would be 2017-05-26

date now = '2017-05-23'
first day of week = '2017-05-22' (Monday)
last day of week = '2017-05-26' (Friday)

Can I do this using date?

Possible duplicate of [How to find the day of week from a date using PHP?](https://stackoverflow.com/questions/12835133/how-to-find-the-day-of-week-from-a-date-using-php) — aynber, May 23 '17 at 14:53

score 9 · Accepted Answer · edited Jan 03 '23 at 06:57

9

Something like this:

<?php
date_default_timezone_set("Asia/Kolkata");
$today = date("Y-m-d");
$mon = new DateTime($today);
$sun = new DateTime($today);
$mon->modify('last Monday');
$sun->modify('next Sunday');
var_dump($mon);
var_dump($sun);
$first_day_of_week = $mon->format("Y-m-d");
$last_day_of_week = $sun->format("Y-m-d");

edited Jan 03 '23 at 06:57

Andy Gee

3,149
2
29
44

answered May 23 '17 at 14:59

alanlittle

460
2
12

2

If today were Monday and you ran `$mon->modify( 'Last Monday' );` would it show the previous week or remain the same? – Nathan Dawson May 23 '17 at 15:01
@NathanDawson remain the same. – WMomesso May 23 '17 at 15:07
1

@alanlittle $mon and $fri are the same? – WMomesso May 23 '17 at 16:37
1

@WagnerFernandoMomesso I'm not sure what you're asking. They are the same at first. When they are initialized, they have the date specified, but then `$mon` is modified to take the date of the previous Monday, and `$fri` is modified to take the date of the next Friday. – alanlittle May 23 '17 at 17:14
2

@alanlittle Now it worked, using so `$mon = $fri = new DateTime()`, did not work but then `$mon = new DateTime(); $fri = new DateTime()` worked, Thanks. – WMomesso May 23 '17 at 17:27
1

I tried this, passing "2018-01-01" (a Monday) and it returned 2017-12-25 instead. – Dario Fumagalli Oct 31 '18 at 01:26
1

Same, this does not appear to be working if today is Monday. Running ```->modify('Last Monday')``` on a Monday modifies the datetime to Monday of the previous week. – stevereds Dec 03 '20 at 09:04
@alanlittle `$mon` and `fri` are the same instance of `\DateTime` object. Its serious bug. See here: https://3v4l.org/3s9mN . You should change initialization of them as @WMomesso suggested above. Also you should start using `\DateTimeImmutable` instead to avoid such bugs. – domis86 May 05 '22 at 11:05
ok, now is better :) – domis86 Jan 04 '23 at 08:07

score 1 · Answer 2 · answered May 23 '17 at 15:02

$the_date = '2017-05-23';
$the_day_of_week = date("w",strtotime($the_date)); //sunday is 0

$first_day_of_week = date("Y-m-d",strtotime( $the_date )-60*60*24*($the_day_of_week)+60*60*24*1 );
$last_day_of_week = date("Y-m-d",strtotime($first_day_of_week)+60*60*24*4 );

echo $first_day_of_week;
echo "~";
echo $last_day_of_week;

score 0 · Answer 3 · answered May 23 '17 at 15:01

0

there is a solution but I'm not sure if you will accept it like this

$First_date = date_create('this week')->format('Y-m-d H:i:s');
$Last_date = date_create('this week +4 days')->format('Y-m-d H:i:s');
echo $First_date;
echo $Last_date;

answered May 23 '17 at 15:01

Omis Brown

199
2
16

score 0 · Answer 4 · answered May 23 '17 at 18:16

My solve,

$datenow = date('Y-m-d');// date now
$mon = new DateTime($datenow);
$fri = new DateTime($datenow);
$mon->modify('Last Monday');
$fri->modify('Next Friday');

using echo

echo 'Monday: '.$mon->format('Y-m-d').'<br>';
echo 'Friday: '.$fri->format('Y-m-d').'<br>';

using var_dump()

var_dump($mon);
var_dump($fri);

Get first/last day of week in php?

4 Answers4

Linked

Related