A function with multiple parameters

<?php
  function add_product($category_id, $code, $name, $price) {
    global $db;
    $query = 'INSERT INTO products
                 (categoryID, productCode, productName, listPrice)
              VALUES
                 (:category_id, :code, :name, :price)';
    $statement = $db->prepare($query);
    $statement->bindValue(':category_id', $category_id);
    $statement->bindValue(':code', $code);
    $statement->bindValue(':name', $name);
    $statement->bindValue(':price', $price);
    $statement->execute();
    $statement->closeCursor();
  }
?>