problem multisite with blog id

At first glance, you’re assigning values to get_current_blog_id instead of comparing them. That is

get_current_blog_id() = 1

should be

get_current_blog_id() === 1

in both places.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)