mysql_free_result() expects parameter 1 to be resource, array given

$rows = Yii::app()->db->createCommand("SELECT t.*

					FROM customer 


				  WHERE t.timestamp >= UNIX_TIMESTAMP('2016-06-11')


				  and t.timestamp <= UNIX_TIMESTAMP('2016-07-11')


				  ORDER BY t.timestamp DESC


				  LIMIT 0, 5")->queryAll();

mysql_free_result($rows);

Above is my code, I want to use mysql_free_result as this above query is in loop, But this error is given " mysql_free_result() expects parameter 1 to be resource, array given". Can anyone help?


$rows = Yii::app()->db->createCommand("SELECT t.*

						FROM customer 

					  WHERE t.timestamp >= UNIX_TIMESTAMP('2016-06-11')

					  and t.timestamp <= UNIX_TIMESTAMP('2016-07-11')

					  ORDER BY t.timestamp DESC

					  LIMIT 0, 5")->queryAll();

The above code will give only array or null as result.

If you want to know how the resource memory is managed, check how the framework files are coded.