Well, the problem with this approach is that you need to define the variables in the main script (login.pl) this is because you are using strict... (and no, this does not mean you should drop strict).

In login.pl, add: use vars qw/$dbase $mysql_user $mysql_pass/;

Also you should add 1; at the end of the config.pl.

If you really don't want to add 'use vars' and such, then you should consider making it a module and using the export/import routines...

Something like (note, filename should change to Config.pm, and the require line should change to 'use Config':

package Config;

use Exporter;
use vars qw/$dbase $mysql_user $mysql_pass/; # You could also use 'our
+ $dbase' etc, but our does more then 'use vars'...

@ISA = qw/Exporter;
@EXPORT = qw/$dbase $mysql_user $mysql_pass/

$dbase = "..."; # or our $dbase if you left out 'use vars'

# other vars

1;
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(updated: added the code for exporter)

update: you should add the 'use vars'-code to every file in which you have 'require config.pl' and 'use strict'... (which is why IMHO it isn't a very good approach)