php function returning 0?

Question

ok, so i am creating a php login system and wanted a simple way to get the link to the logout page by calling a function but it keeps returning 0. He's my function:

function logout_link() {
include("auth_vars.php"); //This file contains $auth_path_login
return $auth_path_login+"?status=loggedout";}

and this is how i am using it:

<a href="<?php echo logout_link();?>">logout</a>

However it keeps producing:

<a href="0">logout</a>

What is going wrong ?

Answer 1

The operator for string concatenation is ., not +.

See http://www.php.net/manual/en/language.operators.string.php