diff --git a/classes/class_cache_redis.php b/classes/class_cache_redis.php
index 9913f6c1..eee8047b 100644
--- a/classes/class_cache_redis.php
+++ b/classes/class_cache_redis.php
@@ -19,7 +19,7 @@ class RedisCache {
     public $redis;
 
     function __construct() {
-        $success = $this->createRedisClient(); // Connect to Redis
+        $success = $this->connect($host = 'localhost', $port = 6379); // Connect to Redis
         if ($success) {
             $this->isEnabled = 1;
         } else {
@@ -27,9 +27,9 @@ class RedisCache {
         }
     }
 
-    private function createRedisClient()
+    private function connect($host, $port)
     {
-        global $BASIC;
+        global $BASIC, $TWEAK;
         $redis = new Redis();
         $params = [
             $BASIC['redis_host'],
@@ -40,29 +40,26 @@ class RedisCache {
         if (!empty($BASIC['redis_timeout'])) {
             $params[] = $BASIC['redis_timeout'];
         }
-        $connectResult = $redis->connect(...$params);
-        $auth = [];
-        if (!empty($BASIC['redis_password'])) {
-            $auth['pass'] = $BASIC['redis_password'];
-            if (!empty($BASIC['redis_username'])) {
-                $auth['user'] = $BASIC['redis_username'];
+        try {
+            $connectResult = $redis->connect(...$params);
+            $auth = [];
+            if (!empty($BASIC['redis_password'])) {
+                $auth['pass'] = $BASIC['redis_password'];
+                if (!empty($BASIC['redis_username'])) {
+                    $auth['user'] = $BASIC['redis_username'];
+                }
+                $connectResult = $connectResult && $redis->auth($auth);
             }
-            $connectResult = $connectResult && $redis->auth($auth);
-        }
-        if ($connectResult) {
-            if (is_numeric($BASIC['redis_database'])) {
-                $selectDatabaseResult = $redis->select($BASIC['redis_database']);
-                if (!$selectDatabaseResult) {
-                    $msg = "select redis database: {$BASIC['redis_database']} fail";
-                    write_log($msg);
-                    throw new \RuntimeException($msg);
+            if ($connectResult) {
+                $this->redis = $redis;
+                if (is_numeric($BASIC['redis_database'])) {
+                    $redis->select($BASIC['redis_database']);
                 }
             }
-            $this->redis = $redis;
-        } else {
-            write_log(sprintf('connect to redis with params: %s , with auth: %s fail', json_encode($params), json_encode($auth)));
+            return $connectResult;
+        } catch (\Exception $exception) {
+            return false;
         }
-        return $connectResult;
     }
 
     function getIsEnabled() {
@@ -205,6 +202,9 @@ class RedisCache {
 
     // Wrapper for Memcache::set, with the zlib option removed and default duration of 1 hour
     function cache_value($Key, $Value, $Duration = 3600){
+        if (!$this->getIsEnabled()) {
+            return;
+        }
         $Value = $this->serialize($Value);
 //        $this->set($Key,$Value, 0, $Duration);
         $this->redis->set($Key, $Value, $Duration);
@@ -263,6 +263,9 @@ class RedisCache {
 
     // Wrapper for Memcache::get. Why? Because wrappers are cool.
     function get_value($Key) {
+        if (!$this->getIsEnabled()) {
+            return false;
+        }
         if($this->getClearCache()){
             $this->delete_value($Key);
             return false;
@@ -282,6 +285,9 @@ class RedisCache {
 
     // Wrapper for Memcache::delete. For a reason, see above.
     function delete_value($Key, $AllLang = false){
+        if (!$this->getIsEnabled()) {
+            return 0;
+        }
         if ($AllLang){
             $langfolder_array = $this->getLanguageFolderArray();
             foreach($langfolder_array as $lf)
diff --git a/forums.php b/forums.php
index 8c62098e..8dc51145 100644
--- a/forums.php
+++ b/forums.php
@@ -474,7 +474,7 @@ if ($action == "viewtopic")
 
 	$topicid = $_GET["topicid"] ?? 0;
 	int_check($topicid,true);
-	$page = $_GET["page"] ?? '';
+	$page = $_GET["page"] ?? 0;
 	$authorid = $_GET["authorid"] ?? 0;
 	if ($authorid)
 	{
diff --git a/include/database/class_db.php b/include/database/class_db.php
index 842b8a14..10352b14 100644
--- a/include/database/class_db.php
+++ b/include/database/class_db.php
@@ -2,11 +2,11 @@
 
 class DB
 {
-    private  DBInterface $driver;
+    private $driver;
 
     private static $instance;
 
-    private static array $queries = [];
+    private static $queries = [];
 
     private function __construct()
     {
diff --git a/include/database/class_db_mysqli.php b/include/database/class_db_mysqli.php
index 13698dd8..3c165105 100644
--- a/include/database/class_db_mysqli.php
+++ b/include/database/class_db_mysqli.php
@@ -2,7 +2,7 @@
 
 class DBMysqli implements DBInterface
 {
-    private mysqli $mysqli;
+    private $mysqli;
 
     public function connect($host, $username, $password, $database, $port)
     {
@@ -43,17 +43,17 @@ class DBMysqli implements DBInterface
         return $this->mysqli->select_db($database);
     }
 
-    public function fetchAssoc($mysqliResult): array|null
+    public function fetchAssoc($mysqliResult)
     {
         return $mysqliResult->fetch_assoc();
     }
 
-    public function fetchRow($mysqliResult): array|null
+    public function fetchRow($mysqliResult)
     {
         return $mysqliResult->fetch_row();
     }
 
-    public function fetchArray($mysqliResult, $type): array|null
+    public function fetchArray($mysqliResult, $type)
     {
         if (is_null($type)) {
             $type = MYSQLI_BOTH;
diff --git a/include/database/interface_db.php b/include/database/interface_db.php
index 4eeca962..f5940776 100644
--- a/include/database/interface_db.php
+++ b/include/database/interface_db.php
@@ -14,11 +14,11 @@ interface DBInterface
 
     public function selectDb($database);
 
-    public function fetchAssoc($result): array|null;
+    public function fetchAssoc($result);
 
-    public function fetchRow($result): array|null;
+    public function fetchRow($result);
 
-    public function fetchArray($result, $type): array|null;
+    public function fetchArray($result, $type);
 
     public function affectedRows(): int;
 
diff --git a/index.php b/index.php
index 8451c5c6..5f643f30 100644
--- a/index.php
+++ b/index.php
@@ -300,12 +300,12 @@ if ($CURUSER && $showpolls_main == "yes")
 				$os = array();
 
 				// Count votes
-				while (($arr2 = mysql_fetch_row($res) !== null) && isset($vs[$arr2[0]]))
+				while (($arr2 = mysql_fetch_row($res) !== null) && isset($arr2[0]) && isset($vs[$arr2[0]]))
 				$vs[$arr2[0]] ++;
 
 				reset($o);
 				for ($i = 0; $i < count($o); ++$i){
-					if ($o[$i])
+					if (isset($vs[$i]) && isset($o[$i]) && $o[$i])
 						$os[$i] = array($vs[$i], $o[$i], $i);
 				}