---
name: "Perl::Critic::Policy::Variables::ProhibitMatchVars"
section: "3pm"
platform: "linux"
package: "perl-perl-critic"
version: "1.156-3"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/Perl::Critic::Policy::Variables::ProhibitMatchVars"
---

# Perl::Critic::Policy::Variables::ProhibitMatchVars(3pm)

Avoid "$\`", "$&", "$'" and their English equivalents.

## NAME

Perl::Critic::Policy::Variables::ProhibitMatchVars - Avoid "$\`", "$&", "$'" and their English equivalents.

## AFFILIATION

This Policy is part of the core Perl::Critic distribution.

## DESCRIPTION

Using the "match variables" ``"$`"``, `$&`, and/or `"$'"` can significantly degrade the performance of a program.  This policy forbids using them or their English equivalents.  See **perldoc** **English** or PBP page 82 for more information.

It used to forbid plain `"use English;"` because it ends up causing the performance side-effects of the match variables.  However, the message emitted for that situation was not at all clear and there is now Perl::Critic::Policy::Modules::RequireNoMatchVarsWithUseEnglish, which addresses this situation directly.

## CONFIGURATION

This Policy is not configurable except for the standard options.

## AUTHOR

Chris Dolan \<cdolan@cpan.org\>

## COPYRIGHT

Copyright (c) 2006-2011 Chris Dolan.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.  The full text of this license can be found in the LICENSE file included with this module.