vars(3perl) - phpMan

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

NAME
       vars - Perl pragma to predeclare global variable names

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

DESCRIPTION
       NOTE: For use with variables in the current package for a single scope, the functionality
       provided by this pragma has been superseded by "our" declarations, available in Perl
       v5.6.0 or later, and use of this pragma is discouraged.  See "our" in perlfunc.

       This pragma will predeclare all the variables whose names are in the list, allowing you to
       use them under "use strict", and disabling any typo warnings for them.

       Unlike pragmas that affect the $^H hints variable, the "use vars" and "use subs"
       declarations are not lexically scoped to the block they appear in: they affect the entire
       package in which they appear.  It is not possible to rescind these 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 v5.34.0                                2023-11-23                                vars(3perl)

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