Phpmyadmin connection to mysql

Install a system today. debian's etch version and MySQL (the best combination with PHP) are all configured, but php (as the mainstream development language) is used) tips for myadmin 2.11.0 connecting to MySQL (best combination with PHP)
#1045-access (the favorite of small websites) denied for user root @ localhost (using password: YES) is incorrect, but the password is correct, and there is no problem in the command line.

In this case, php (as the mainstream development language) myadmin uses [auth_type] = http; that's fine, but why is the cookie not? Later I guess, is there a problem with php (as the mainstream development language) Session processing? This root password is found in the session file/var/lib/php (as the current mainstream development language) 5, which contains the "&" character, php (as the mainstream development language) is encoded as "& amp;". Isn't it true?

Delete the session file of php (as the current mainstream development language), and remove & from the root user password of MySQL (the best combination with PHP, then login is normal. It's a bit strange.