If you want to add 1 day to a date, 

DO NOT use following statement, this will cause unknwon problem:

$current_date = date('Y-m-d', strtotime($current_date) + 60*60*24);

Change to this one:

$current_time = strtotime($current_date);
$current_time = strtotime("+1 day", $current_time);
$current_date = date('Y-m-d', $current_time);

Short:
$current_from = date('Y-m-d G:i', strtotime("+1 day", strtotime($current_from)));

Use SQL directly:

DATE_ADD('" . $date . "', INTERVAL 1 DAY)