Comparing timestamp to current time from database

Question

I need to test current time against a datetime from database, if it has been 30 mins then execute code, if not then dont. This is where I am at and I am stuck:

Answer 1

First convert $timest to timestamp

$time = strtotime($timest);

$curtime = time();

if(($curtime-$time) > 1800) {     //1800 seconds
  //do stuff
}