The date string looks like this
2011-08-19 17:14:40
(year-month-day hours:minutes:seconds)
How can I find out if the date is older than the current date with more than 30 days?
Try using something like this:
if(strtotime('2011-08-19 17:14:40') < strtotime('-30 days')) {
// this is true
}
Besides, this string looks like it is stored in SQL as datetime/timestamp field. You can directly select all entries from your database with old dates using:
SELECT ... WHERE `datetime` + INTERVAL 30 DAY < NOW()