Merge pull request #13 from tanhongit/4-clean_code

move the position of the query function

app/controllers/Controller.php

@@ -11,7 +11,7 @@ class Controller
      */
     public function index()
     {
-        self::renderView('frontend.index');
+        $this->renderView('frontend.index');
     }
 
     /**

app/core/Database.php

@@ -24,6 +24,15 @@ public function connect()
         return $this->connection;
     }
 
+    /**
+     * @param $sql
+     * @return bool|mysqli_result
+     */
+    public function _query($sql)
+    {
+        return mysqli_query($this->connectResult, $sql);
+    }
+
     /**
      * Execute the query and process the returned results
      * @param $sql

app/models/BaseModel.php

@@ -63,15 +63,6 @@ public function find($table, $id)
         return $this->getRecordByID($table, $id);
     }
 
-    /**
-     * @param $sql
-     * @return bool|mysqli_result
-     */
-    public function _query($sql)
-    {
-        return mysqli_query($this->connectResult, $sql);
-    }
-
     /**
      * Escape special characters in string
      * @param $str