Call an Extension on Every Page Load

At what point in the page load would you need to execute code?

Off the top of my head I’d suggest looking at the sessions_end hook.

I forgot to mention that. Its a permission type extension, so if the page was not supposed to be displayed, I would want to prevent the page from displaying and redirect to another screen.

The sessions_end hook is executed on every single page load (front and back end) so you can execute whatever code you want there processing your permissions code.

Thanks!

If you only need to use this code in the CP you should also consider adding a wrapping conditional around your required code which checks if the page load is a CP page.

public function sessions_end()
{
   if (REQ == 'CP')
   {
       // your code here
   }
}