Разбивка inf.php по классам.

models/PresentsModel.php

@@ -7,7 +7,20 @@
 
 class PresentsModel
 {
-    public function getAllPresents($user_id) {
-        return db::c()->query('SELECT sender_id, image FROM `users_presents` WHERE owner_id = ?i', $user_id);
+    protected $DB;
+
+    public function __construct(int $user_id)
+    {
+        $this->DB = db::c()->query('SELECT sender_id, image FROM `users_presents` WHERE owner_id = ?i', $user_id);
+    }
+
+    public function getAllPresents()
+    {
+        return $this->DB;
+    }
+
+    public function getPresentsSum()
+    {
+        return $this->DB->getNumRows();
     }
 }