boolean       File_Passwd_Authdigest::userInRealm ( 
    string $user
     , string $realm
   )
Ckeck if a certain user is in a specific realm.
$user
     the user to check
$realm
     the realm the user shuold be in
Returns TRUE if user is in realm, FALSE if not or PEAR_Error on failure.
| Error Code | Summary | 
|---|---|
| FILE_PASSWD_E_EXISTS_NOT | specified realm doesn't exist | 
This function can not be called statically.