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Full Discussion: Variables in perl
Top Forums Shell Programming and Scripting Variables in perl Post 302695765 by P3rl on Monday 3rd of September 2012 07:33:40 PM
Old 09-03-2012
Variables in perl

I don't fully understand variables in perl.

If we have a variable defined like this "my $number = 1" then this is called a lexical variable? But if you define this at the top of a script then why isn't it a global variable because it would be available throughout the file?

Sorry if this is a really stupid question to ask but I'm getting myself confused.
 

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CGI::Compile(3pm)					User Contributed Perl Documentation					 CGI::Compile(3pm)

NAME
CGI::Compile - Compile .cgi scripts to a code reference like ModPerl::Registry SYNOPSIS
use CGI::Compile; my $sub = CGI::Compile->compile("/path/to/script.cgi"); DESCRIPTION
CGI::Compile is an utility to compile CGI scripts into a code reference that can run many times on its own namespace, as long as the script is ready to run on a persistent environment. NOTE: for best results, load CGI::Compile before any modules used by your CGIs. RUN ON PSGI
Combined with CGI::Emulate::PSGI, your CGI script can be turned into a persistent PSGI application like: use CGI::Emulate::PSGI; use CGI::Compile; my $cgi_script = "/path/to/foo.cgi"; my $sub = CGI::Compile->compile($cgi_script); my $app = CGI::Emulate::PSGI->handler($sub); # $app is a PSGI application CAVEATS
If your CGI script has a subroutine that references the lexical scope variable outside the subroutine, you'll see warnings such as: Variable "$q" is not available at ... Variable "$counter" will not stay shared at ... This is due to the way this module compiles the whole script into a big "sub". To solve this, you have to update your code to pass around the lexical variables, or replace "my" with "our". See also <http://perl.apache.org/docs/1.0/guide/porting.html#The_First_Mystery> for more details. AUTHOR
Tatsuhiko Miyagawa <miyagawa@bulknews.net> CONTRIBUTORS
Rafael Kitover <rkitover@cpan.org> Hans Dieter Pearcey <hdp@cpan.org> COPYRIGHT &; LICENSE Copyright (c) 2009 Tatsuhiko Miyagawa <miyagawa@bulknews.net> This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. SEE ALSO
ModPerl::RegistryCooker CGI::Emulate::PSGI perl v5.14.2 2011-05-24 CGI::Compile(3pm)
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