vars(3p) Perl Programmers Reference Guide vars(3p)
vars - Perl pragma to predeclare global variable names
(obsolete)
use vars qw($frob @mung %seen);
NOTE: For variables in the current package, the functional-
ity provided by this pragma has been superseded by "our"
declarations, available in Perl v5.6.0 or later. See "our"
in perlfunc.
This will predeclare all the variables whose names are in
the list, allowing you to use them under "use strict", and
disabling any typo warnings.
Unlike pragmas that affect the $^H hints variable, the "use
vars" and "use subs" declarations are not BLOCK-scoped.
They are thus effective for the entire file in which they
appear. You may not rescind such declarations with "no
vars" or "no subs".
Packages such as the AutoLoader and SelfLoader that delay
loading of subroutines within packages can create problems
with package lexicals defined using "my()". While the vars
pragma cannot duplicate the effect of package lexicals
(total transparency outside of the package), it can act as
an acceptable substitute by pre-declaring global symbols,
ensuring their availability to the later-loaded routines.
See "Pragmatic Modules" in perlmodlib.
perl v5.8.8 2005-02-05 1