I needed to subtract an arrival date from a departure date to work out the number of nights a customer stayed. So I used
$Arrival_Date = strtotime($Arrival_Date);
$Departure_Date = strtotime($Departure_Date);
$NoNights = ($Departure_Date - $Arrival_Date) / 86400;
This seemed to work fine, however I now need to put those 2 variables back into the correct format to be stored in my MySql table. How can I do this? and secondly a friend said I should be using MkDate to do this kind of thing, is this true?