I am developing my skills in PHP and MySQL by copying all the PHP codes and database tables of a complete e-commerce site from a book.
One of the tables in the database is "product". I added a few columns (date starts, date end, etc.) in order to practice. When I go to browser to retrieve "product list" coming from home page, I have notice that their are chances the HTML page would show WITHOUT the CSS enhancement. I tried going to another page such as "contact page" and the CSS enchancement is intact. Then I tried going back once more to product page but this time the CSS enhancement is present. Any idea why this happening and please help me how to fix this. I am using XAMPP. Thank you in advance.