title: PHP session overlapping for two customers
body: <p>Have a session problem with application when opened in multiple tabs of a browser.
  In my project a user can have multiple log in id's so he could log into the app with two id's
  at the same time as two diferent users. but when they try to log in with two id in multiple
  tabs of a browser. the same session of the browser is being shared and the data gets messed up.
  Any insights to solve this issue?</p>
  
  <p>I see a pattern in mail.yahoo.com , if i log into my mail.yahoo with one user id and try to login in
  to other user id in the new tab. one of them logs out. Any idea how this could be done...</p>
  
  <p>Thanks </p>