Add 30 seconds to the time with PHP

What about using strtotime? The code would then be:

strtotime( '+30 second' );

If you're using php 5.3+, check out the DateTime::add operations or modify, really much easier than this.

For example:

$startTime = new DateTime("09:00:00");
$endTime = new DateTime("19:00:00");


while($startTime < $endTime) {

$startTime->modify('+30 minutes'); // can be seconds, hours.. etc

echo $startTime->format('H:i:s')."<br>";
break;
}

$time = date("m/d/Y h:i:s a", time() + 30);

$time = date("m/d/Y h:i:s a", time() + 30);

//or

$time = date("m/d/Y h:i:s a", strtotime("+30 seconds"));