php - unix timestamp round to midnight

Question

If I have a random unix timestamp, how can I round it down to today's midnight or the midnight selected by the user. The reason for this is that I want to add hours and minutes after a certain day's midnight.

For example if the timestamp is 1324189035 then how can I remove the hours, minutes, and seconds to put the timestamp at midnight for that day.

Answer 1

echo date('d-m-Y H:i:s', strtotime('today', 1324189035));