Firstly i have tried to google all my questions of this but has not found the solution to my answer. I am trying to either use and existing browser session or authenticate if the session does not exist. I have Site A: https://mysite.com/Login.aspx This is my internal site that i am trying to build so i can perform some function against Site AI first thought that i could use jquery jsonp post to the site which i think i can do but it must first be authenticated or Site A will just redirect all posts to the login page. I have used external third party ui testing sites that use basic http authentication to take screenshots of my Site A but im unsure how to replicate that authentication process on my end. Im looking for a direction or example to get me in the right direction, it seems like it should be easy enough but ive never used authentication in php so i am lost 