title: Builing a cart with multiple items and the PayPal button in PHP
body: <p>I'm building a shopping cart in PHP and want to allow customers to enter the quantity for each item and then press a button which brings you to PayPal and lists how many products you have.</p>
  
  <p>On PayPal's website, all the info I found seems to lead to me needing a shopping cart. If this is absolutely necessary, how could I implement that?</p>