buy chocolate pdo

src/buy_chocolate.php

@@ -34,6 +34,7 @@ if($_SERVER["REQUEST_METHOD"] === "POST"){
     $time = date("Y-m-d H:i:s");
 
     $sql = "INSERT transactions VALUES (:username, :chocolate_id, :amount, :totalprice, :address, :time)";
+    $pdo = $connect_db();
     $stmt = $pdo->prepare($sql);
 
     $stmt->bindParams(':username', $username);