From ac268861b5d9d405bd03ea55c37e5757db04da32 Mon Sep 17 00:00:00 2001
From: Aleksei Miheev <aleksei@miheev.info>
Date: Wed, 8 Jan 2014 23:52:57 +0400
Subject: [PATCH] (try to) optimize a little, no need for mysql to count that,
 we can do it just fine

---
 forum/Sources/Subs.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/forum/Sources/Subs.php b/forum/Sources/Subs.php
index 6b5e47f..44a2a49 100644
--- a/forum/Sources/Subs.php
+++ b/forum/Sources/Subs.php
@@ -1432,9 +1432,10 @@ function writeLog($force = false)
 	// Guests use 0, members use their session ID.
 	$session_id = $user_info['is_guest'] ? 'ip' . $user_info['ip'] : session_id();
 
+    $sess_expire_time = time() -  ($modSettings['lastActive'] * 60);
 	db_query("
 		DELETE FROM {$db_prefix}log_online
-		WHERE logTime < NOW() - INTERVAL " . ($modSettings['lastActive'] * 60) . " SECOND
+		WHERE logTime < '{$sess_expire_time}'
 			OR session = '$session_id'" . (empty($ID_MEMBER) ? '' : " OR ID_MEMBER = $ID_MEMBER"), __FILE__, __LINE__);
 	db_query("
 		INSERT IGNORE INTO {$db_prefix}log_online