如何从PHP的2个日期范围获取月份开始和结束日期

Question

I have 2 date range

1) 10 Jan to 25 Dec 2017

2) 25 Jan to 10 Dec 2017

now here i want an array that have start-date and end-date of every month. with this condition

if first month have >15 days then i want array like this (for 10 Jan to 25 Dec 2017 date range)

array (
array (
'start_date' => '01/10/2017',
'end_date' => '01/31/2017',
'total_days'=>'21'),
array (
'start_date' => '02/01/2017',
'end_date' => '02/28/2017',
'total_days'=>'28'),
......
.......
array (
'start_date' => '12/01/2017',
'end_date' => '12/25/2017',
'total_days'=>'25'),
)

2nd if first month have <15 days then first month start-date + next month's end-date then next month's start + end-date and so on if first month have less then 15 days.

for 25 Jan to 10 Dec 2017 date rang

array (
array (
'start_date' => '01/10/2017',
'end_date' => '02/28/2017',
'total_days'=>'38'),
array (
'start_date' => '03/01/2017',
'end_date' => '03/31/2017',
'total_days'=>'31'),
......
.......
array (
'start_date' => '12/01/2017',
'end_date' => '12/10/2017',
'total_days'=>'10'),
)

Thanks