Get array element by its begin/end date in PHP - php

Question

I want to know a nice way to check which element in an array is the leading one (has priority) by its begin/end date.
For example, here is the array:
(
[0] => Array
(
[ID] => 16
[begin_date] => DateTime Object
(
[date] => 2016-01-01
[timezone_type] => 3
[timezone] => UTC
)
[end_date] => DateTime Object
(
[date] => 2016-11-30
[timezone_type] => 3
[timezone] => UTC
)
)
[1] => Array
(
[ID] => 33
[begin_date] => DateTime Object
(
[date] => 2015-01-04
[timezone_type] => 3
[timezone] => UTC
)
[end_date] => DateTime Object
(
[date] => 2016-02-29
[timezone_type] => 3
[timezone] => UTC
)
)
)
In this case the second element has priority. Because its begin_date is earlier than the begin_date of the first element. And, its end_date is still in the future.
Conditions:
If the begin_date is in the future, it cannot be the leading element
If the end_date has expired (if today > end_date), the leading
element must be the one with the latest end_date
Thanks in advance!

Answer 1

uasort($memberArray,function($a,$b){
$c = $a['begin_date']['date'] - $b['begin_date']['date';
$c .= $a['overall']['PD'] - $b['overall']['PD'];
$c .= $a['overall']['PF'] - $b['overall']['PF'];
$c .= $a['overall']['W'] - $b['overall']['W'];
$c .= $a['overall']['MP'] - $b['overall']['MP'];
return $c;
});