Question

I have a MySQL table that contains datetime data stored in it.
I need to know if 30 days has passed since the given time.
How can I do this?

Mockup code:

$query = mysql_query("SELECT data FROM myTable LIMIT 1");
$row = mysql_fetch_array($query);
if( days_passed($row['date'], 30) )
     echo "30 days has passed since the given date time.";

Answer 1

Answering the question directly, you can use this function in your if statement.

function days_passed($date, $days) {
    $old = new DateTime($date);
    $now = new DateTime();
    $interval = $old->diff($now);
    return ($interval->days >= $days);
}

That will return true if the difference between the date provided and now is >= the number of days supplied in the second argument.

However, your may prefer to do this with SQL.