Question

I want to know if I can make my wp-login.php to run as like index.php in WordPress? And if the user is already logged in it will go to index.php?

Answer 1

Add to the bottom of your wp-config.php:

if(!is_user_logged_in()){header("Location: http://yoursite.com/wp-login.php");} 
if(is_user_logged_in()){header("Location: http://yoursite.com");}