migthegreek - 9:49 am on Oct 20, 2010 (gmt 0)

Looks like you are missing lots of things, although I can't tell if you've stripped some of it out for the purpose of posting it here. In any case, you need to:

1. Have an HTML form that will post the username and password to the PHP script.
   
   
2. Construct the query using the values from the form.
   
   
3. Make sure the values from the form are sanitised and quoted.
   
   
4. Make a database connection.
   
   
5. Actually run the query.