Receive data from database and pass to html using twig

App/Models/Post.php

@@ -41,10 +41,8 @@ class Post extends \Core\Model
 
             if ($stmt = $db->query($sql)) {
                 $result = $stmt->fetchAll(\PDO::FETCH_ASSOC);
-                // For tests
-                return true;
+                return $result;
             }
-            return false;
         } catch (PDOException $e) {
             echo $e->getMessage();
         }
@@ -62,11 +60,29 @@ class Post extends \Core\Model
             if ($query->execute([$id])) {
                 if ($query->rowCount() === 1) {
                     $result = $query->fetchAll(\PDO::FETCH_ASSOC);
-                    // For tests
-                    return true;
+                    return $result;
+                }
+            }
+        } catch (PDOException $e) {
+            echo $e->getMessage();
+        }
+    }
+
+    public function showCategories()
+    {
+        try {
+            $db = static::connectDB();
+
+            $sql = "SELECT * FROM kategori";
+
+            $query = $db->prepare($sql);
+
+            if ($query->execute()) {
+                if ($query->rowCount() > 1) {
+                    $results = $query->fetchAll(\PDO::FETCH_ASSOC);
+                    return $results;
                 }
             }
-            return false;
         } catch (PDOException $e) {
             echo $e->getMessage();
         }