title: Linking php with xhtml
body: <p>Hey guys quick silly question but i cant for the life of me remember how to do it</p>
  
  <p>i have a php file and i want it to link in with a xhtml file so it runs at the start of the page load up, the php it LDAP authentication and i want this to be successful before a user goes to the page </p>
  
  <p>thanks !</p>