Grouping days into months between 2 dates in PHP - php

Question

Lets say we have:
$startDt="10/28/2017";
$endDt="12/2/2017";
I want to get array of days grouped into months in between these dates. Output must be like:
[
"October"=>[28, 29, 30, 31],
"November"=>[1, ..., 30],
"December"=>[1,2]
]
Can't figure out how to achieve it. Any suggestions?

Answer 1

You can use PHP's built-in classes DateTime, DateInterval and DatePeriod for this; e.g:
<?php
$start = new DateTime('10/28/2017');
$end = new DateTime('12/2/2017');
$interval = new DateInterval('P1D'); // 1 day
$period = new DatePeriod($start, $interval, $end);
$days = [];
foreach ($period as $dt) {
$month = $dt->format('F');
$day = $dt->format('j');
$days[$month][] = $day;
}
print_r($days);
Here is the documentation about date formatting
Note that DatePeriod goes up to but excludes the last date if the times are the same (which is the case here, so you probably want to modify the end date to address this - adding a second should do the trick; e.g:
$end = new DateTime('12/2/2017');
$end->modify('+1 second');
// or $end->setTime(0, 0, 1); H/T to #ishegg
$period = new DatePeriod($start, $interval, $end);
// etc.
This yields:
Array
(
[October] => Array
(
[0] => 28
[1] => 29
[2] => 30
[3] => 31
)
[November] => Array
(
[0] => 1
[1] => 2
[2] => 3
[3] => 4
[4] => 5
[5] => 6
[6] => 7
[7] => 8
[8] => 9
[9] => 10
[10] => 11
[11] => 12
[12] => 13
[13] => 14
[14] => 15
[15] => 16
[16] => 17
[17] => 18
[18] => 19
[19] => 20
[20] => 21
[21] => 22
[22] => 23
[23] => 24
[24] => 25
[25] => 26
[26] => 27
[27] => 28
[28] => 29
[29] => 30
)
[December] => Array
(
[0] => 1
)
)
Hope this helps :)