(PHP 4)
hw_Identify — Identifies as user
$link
   , string $username
   , string $password
   )
   Identifies as user with username and
   password. Identification is only valid for the
   current session. I do not think this function will be needed very often.
   In most cases it will be easier to identify with the opening of the
   connection.
  
linkThe connection identifier.
usernameThe username.
passwordThe password.