fix to TZRedis

@@ -23,7 +23,7 @@ class TZRedis {
         }
     }
 
-    static function set($key, $val, $expire = 60) {
+    static function set($key, $val, $expire = 300) {
         try {
 
             self::connectInstance();
@@ -33,7 +33,7 @@ class TZRedis {
             }
             
         }catch (Throwable $e) {
-            error_log(self::$err."Failed to set ".$key." with ".$val);
+            error_log(self::$err."Failed to set ".$key." with ".$val. ", error message = ".$e->getMessage());
         }
     }
 
@@ -44,7 +44,7 @@ class TZRedis {
 
             if(self::$redis) {
                 if($unserialize) {
-                    unserialize(self::$redis->get($key));
+                    return unserialize(self::$redis->get($key));
                 } else {
                     return self::$redis->get($key);
                 }
@@ -75,7 +75,7 @@ class TZRedis {
             self::connectInstance();
 
             if(self::$redis) {
-               return self::$redis->delete($key);
+               self::$redis->delete($key);
             }
 
         }catch (Throwable $e) {