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vars(3)                Perl Programmers Reference Guide                vars(3)

       vars - Perl pragma to predeclare global variable names (obsolete)

           use vars qw($frob @mung %seen);

       NOTE: For variables in the current package, the functionality provided by this pragma has been superseded by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 dec-
       larations 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 pack-
       age lexicals (total transparency outside of the package), it can act as an acceptable substitute by pre-declar-
       ing global symbols, ensuring their availability to the later-loaded routines.

       See "Pragmatic Modules" in perlmodlib.

perl v5.8.8                       2001-09-21                           vars(3)