get days between two date carbon code example
Example 1: different days in carbon laravel between different dates
$created = new Carbon($survey->created_at);
$now = Carbon::now();
$difference = ($created->diff($now)->days < 1)
? 'today'
: $created->diffForHumans($now);
Example 2: carbon months between dates
$to = \Carbon\Carbon::createFromFormat('Y-m-d H:s:i', '2015-5-5 3:30:34');
$from = \Carbon\Carbon::createFromFormat('Y-m-d H:s:i', '2016-6-6 9:30:34');
$diff_in_months = $to->diffInMonths($from);
print_r($diff_in_months);