magento后台登陆404、Front controller reached 100 router match iterations的解决方案

(1)执行如下sql

SET SQL_SAFE_UPDATES=;
SET FOREIGN_KEY_CHECKS=;
UPDATE `core_store` SET store_id =  WHERE code='admin';
UPDATE `core_store_group` SET group_id =  WHERE name='Default';
UPDATE `core_website` SET website_id =  WHERE code='admin';
UPDATE `customer_group` SET customer_group_id =  WHERE customer_group_code='NOT LOGGED IN';
SET FOREIGN_KEY_CHECKS=;
SET SQL_SAFE_UPDATES=;