Manual

- Overview
- Tutorials
- FAQs
- History / Changes
- License

Reference

- Language
- Functions
- Operators
- Special Variables
- Pragmas
- Utilities
- Internals
- Platform Specific

Modules

- A • B • C • D • E
- F • G • H • I • L
- M • N • O • P • S
- T • U • X

News / Blogs

- Perl Buzz
- Perl Iron Man
- Perlsphere
- Planet Perl
- TPF news
- Use Perl

See also

- CPAN
- Perl.org
- Perl.com
- Perl 5 Wiki
- Perl Jobs
- Perl Mongers
- Perl Monks

Contact

- Site designed and maintained by Jon Allen (JJ)
- http://perl.jonallen.info

- View the project page and FAQs

# vars

Perl 5 version 10.1 documentation
Go to top • Show page index • Download PDF

# vars

- NAME
- SYNOPSIS
- DESCRIPTION

# NAME

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

# SYNOPSIS

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

# DESCRIPTION

NOTE: For variables in the current package, the functionality provided by this pragma has been superseded by `our` declarations, available in Perl v5.6.0 or later.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.

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.

Page index

- NAME
- SYNOPSIS
- DESCRIPTION

Recently read

Tools

- Preferences