The winner solution : Server side – this solution is also working when somebody (accidentally) disable cookie in his/her browser.

Client side vs server side shopping card storage : http://stackoverflow.com/questions/21077697/client-side-vs-server-side-shopping-card-storage

Best way to store shopping cart details localstorage or server side cookies : http://stackoverflow.com/questions/13874912/best-way-to-store-shopping-cart-details-localstorage-or-server-side-cookies

Creating A Client-Side Shopping Cart : https://www.smashingmagazine.com/2014/02/create-client-side-shopping-cart/

Security is important. If we read the security notes of the W3C’s specification, then we’d be aware of the security risks of even a client-side technology such as Web storage.

The Shopping cart – How to craft a e-shop with Laravel – https://www.codetutorial.io/the-shopping-cart-how-to-craft-an-e-shop-with-laravel/

JQuery shopping cart

Side shopping cart : https://codyhouse.co/gem/side-shopping-cart/

10+ jQuery Based Shopping Carts : http://www.sitepoint.com/10-jquery-based-shopping-carts/