Security

Hi all,

I have a Database and my interface with PHP, but I have problems,
I can connect to a  Data Base using PHP without using login and password.  
If I have an user with restricted privileges, how can I force this user to 
access with login and password, via WEB?

I use pg_connect("host=localhost port=5432 user=wwwuser password=XXX 
dbname=YYY"); but if I use _connect("host=localhost port=5432 dbname=YYY"); 
the program connect without problems a the Database, I believe that I have 
serius problme of security.

I need your Help....

Thanks in advanced,
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