if php date is 24 hours after stored mysql date

I'm trying to do a function that will check the php date against what is in the database. If the current date (YYYY-MM-DD HH:MM:SS) is 24 hours after the stored database date, then it will continue, otherwi开发者_如何学Pythonse it won't do anything.. If that makes sense?

Here's how I'm trying to get it to work, but not 100% sure how:

$now = date("Y-m-d H:i:s");

foreach($results as $item) {
  if (  /*item date is 24 hours or more earlier than $now*/ ) { /* this is what I'm not sure how to do */
     //do something

  } else {
    //do nothing
  };
};

If someone could help me get this working, I'd greatly appreciate it. I just don't know how to compare $item->date with $now and see if $item->date is 24 hours or more behind $now..

You can use strtotime instead of date math. Personally I think it reads much better.

if (strtotime($item->date) <= strtotime('-1 day')) {
  // date is more than or equal to 24 hours old
}

foreach($results as $item) {
  if (time() >= strtotime($item['date']) + 86400) {
    // current time is 86400 (seconds in one day) or more greater than stored time
  } else {
    //do nothing
  };
};

Note that if the stored date isn't in the same timezone as the server you'll need to mess with timezones - see here for starters.

Note that I store dates and times in MySQL as Unix timestamps to avoid some of these problems. I know it's not good database practice, but then PHP stores times as Unix timestamps anyway.