Can not login into admin in localhost : Magento Problem
June 13, 2011
this is the most common problem we face when we install the
magento in localhost. This is because of session parameter.
Really simple solution to commenting a single line. Below is the solution
1) go to root/app/code/core/Mage/Core/Model/Session/Abstract/
2) Open the file Varien.php
3) go to line no. 100
4) you will get call_user_func_array('session_set_cookie_params', $cookieParams);
5) Just delete or comment this line.
6) Now you can login into admin.