fout in query (dateadd) (Opgelost)

$q = "SELECT dateadd(S,-30,NOW()) AS outdated FROM users";

$q = "SELECT dateadd(S,-30,NOW()) AS outdated FROM users";

"SELECT ADDDATE(NOW(),SECOND -300) AS outdated FROM users";

"SELECT ADDDATE(NOW(),SECOND -300) AS outdated FROM users";

(TIME_TO_SEC(NOW()) - TIME_TO_SEC(lastseen)) AS difference

(TIME_TO_SEC(NOW()) - TIME_TO_SEC(lastseen)) AS difference

$q = mysql_query("SELECT dateadd(S,-300,NOW()) AS outdated FROM users");
  
  while($user=mysql_fetch_array($q))
  {
    echo "$user[outdated]" . "<br>";
  }

$q = mysql_query("SELECT dateadd(S,-300,NOW()) AS outdated FROM users");
 
  while($user=mysql_fetch_array($q))
  {
    echo "$user[outdated]" . "<br>";
  }