PHP and MySQL auth?

Hello, all. What is the difference between: Case 1: I auth with header('WWW-Auth.......') and validate the user from a plain file. Next, i do something like mysql_connect($the_db_host,$the_db_username,$the_db_pass); mysql_select_db($the_db_name); mysql_query("select * from table"); ----- and it works fine. Case 2. Without any form of auth, I read the text file and do mysql_connect($the_db_host,$the_db_username,$the_db_pass); mysql_select_db($the_db_name); mysql_query("select * from table"); and the server response is: Error 2002: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock; (111) What does this auth do with the rights on mysql? Thanks. Alex Sofronie maxx@mail.dntis.ro