title: Common login between joomla and another php website
body: <p>I am learning joomla and I have question regarding it.
  I develop a website in php say <strong>www.xyz.com/php_website/</strong> and Its CMS is created in Joomla say <strong>www.xyz.com/joomla_website/</strong> it means both are in same server but both have different login system. so I want to do is if admin login in php_website,he can also logged in automatically in joomla_website,basically I want a common login between these websites.....Please anybody can give me a solution for my problem....Thanks in advace.</p>