PHP - Count number of days between 2 dates

Question

I am trying to write a function that can count the number of days between 2 dates. I currently have the below but it is giving me some unexpected results:

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Answer 1

Please use diff function for get days between two date.

$date1 = new DateTime("25-03-2016");
$date2 = new DateTime("01-04-2016");

echo $diff = $date2->diff($date1)->format("%a");