Looping through times but with breaks

PHP
1

Hi guys

I know how to do a standard loop of 30 minutes from a start time to a end time but I want to loop through times every 30 minutes from 9am to 5pm but with 15 minute breaks at 10:30 and 14:45

This will then start the 30 minute loop again from after the 15 minute break. So it should display like this

09:00
09:30
10:00 then 15 minute break
10:45
11:15
11:45
12:15
12:45
13:15
13:45
14:15 then 15 minute break
15:00
15:30
16:00
16:30

Any help on how to do this would be greatly appreciated

2

if(time == 10:00 || time == 14:15) { time += 00:15 }

looping variables arnt immutable.

3

Here is my example:

<?
   $event_length = 30;
   $etime = strtotime("09:00:00");
   while(1)
   {
	   $next_time = date('H:i', $etime);
	   if($next_time=="10:30" || $next_time=="14:45")
	   {
		   $etime = strtotime("+15 minutes", $etime);
		   $next_time = date('H:i', $etime);
		   echo " -- 15 minute break";
	   }
	   else
	   {
		   echo "<br>$next_time";
		   $etime = strtotime("+$event_length minutes", $etime);
	   }
	   if($next_time=="16:30") break;
   }
?>

You can test it out here:
http://w-cms.org/test/looptime.php