title: PHP - what is an alternative to session variables
body: <p>I am storing a lot of variables in session, which is creating a performance problem.
  So, I have been asked to store it somewhere else, I can store it in the database, but that would again be slow.</p>
  
  <p>Is there any better alternative to store session variables? 
  Global variable are per file/request. While cookies will open the variables to users and will not keep it server side.</p>
  
  <p>Thanks in advance for your answers!</p>