PHP session sending header “Cache-Control: no-store, no-cache, must-revalidate”. How to remove this?

PHP session sending header “Cache-Control: no-store, no-cache, must-revalidate”. How to remove this?

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