function bb_auth( $scheme = 'auth' )
{ // Checks if a user has a valid cookie, if not redirects them to the main page
}
I’m guessing it “Checks if a user has a valid cookie, if not redirects them to the main page”
First link on google
		
	 
	
	
	
 
		
			
	
	
		
		1.x supports SSL so scheme can also be for SSL ‘secure_auth’
I guess the idea is to use a different cookie than the one exposed via http.
		
	 
	
	
	
 
		
			
	
	
		
		There’s also bb_auth( 'logged_in' ) if you aren’t checking if the user can be in bb-admin.
		
	 
	
	
	
 
		
			
	
	
		
		 @Ben
Didn’t get your point. I can’t see that in file either functions.bb-pluggable.php
		
	 
	
	
	
 
		
			
	
	
		
		bb_auth() can be called with 'logged_in' as the $scheme to check if a user is logged in.
		
	 
	
	
	
 
		
			
	
	
		
		but there is nothing in the function definition for an argument 'logged-in'
how did you get that?
		
	 
	
	
	
 
		
			
	
	
		
		 @ashfame
in the function bb_salt($scheme), there are 4 cases for the variable $scheme one of which checks for the value ‘logged_in’  (all are auth, secure_auth, logged_in, nonce)
		
	 
	
	
	
 
		
			
	
	
		
		 @nehagoyal
and we are talking of bb_auth() here. Aren’t we?
		
	 
	
	
	
 
		
			
	
	
		
		bb_auth calls bb_validate_auth_cookie, which calls WP_Auth::validate_auth_cookie, which uses a variable defined in bb-settings.php. The cookies you can check for are auth and logged_in, with auth automatically switching to secure_auth if you’re on SSL.