php - Round formatted time value to the nearest half-hour

Question

I need 0:30 through 0:59 to round down to 0:30.
I need 0:00 through 0:29 to round up to 0:30.

Example: 08:56 will round down to 08:30 where 09:00 and 09:01 will need to round up to 09:30.
Seconds should be omitted or rounded to :00

Answer 1

Why don't you just do this:

$hour = date('H');
$minute = (date('i')>30)?'30':'00';
echo "$hour:$minute";

DEMO

UPDATE
I just realized that you asked all time to be rounded to :30:

$hour = date('H');
$minute = '30'; //always 30
echo "$hour:$minute";