title: How to allow only 2 selection checkbox in a form with?
body: <p>I want to put a form on my website for giving away 3 prizes. Each member to be able to select only 2 item on the list that they wish to win.</p>
  
  <p>I have created the form and with JavaScript it works fine, but it's client side and can't be trusted.</p>
  
  <p>What is the best way to implement such thing and be sure that each user can ONLY select 2 item? best way to do it with PHP?</p>
  
  <p>Appreciate any help.</p>