| English(3perl) - phpMan
English(3perl) Perl Programmers Reference Guide English(3perl)
NAME
English - use nice English (or awk) names for ugly punctuation variables
SYNOPSIS
use English;
use English qw( -no_match_vars ) ; # Avoids regex performance
# penalty in perl 5.16 and
# earlier
...
if ($ERRNO =~ /denied/) { ... }
DESCRIPTION
This module provides aliases for the built-in variables whose names no one seems to like
to read. Variables with side-effects which get triggered just by accessing them (like $0)
will still be affected.
For those variables that have an awk version, both long and short English alternatives are
provided. For example, the $/ variable can be referred to either $RS or
$INPUT_RECORD_SEPARATOR if you are using the English module.
See perlvar for a complete list of these.
PERFORMANCE
NOTE: This was fixed in perl 5.20. Mentioning these three variables no longer makes a
speed difference. This section still applies if your code is to run on perl 5.18 or
earlier.
This module can provoke sizeable inefficiencies for regular expressions, due to
unfortunate implementation details. If performance matters in your application and you
don't need $PREMATCH, $MATCH, or $POSTMATCH, try doing
use English qw( -no_match_vars ) ;
. It is especially important to do this in modules to avoid penalizing all applications
which use them.
perl v5.20.2 2014-12-27 English(3perl)
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