Template::TAL::Language::PerlValue - use perl in TAL attributes
(in a template) <hi tal:content="perl: `cat /etc/passwd`">title here</h1>
Loading this module as a language into your TAL parser will allow you to use perl code in your attribute values. This is, of course, horribly dangerous. The core of TAL is safe to expose to users - there are no core functions that let a template damage your system. But loading PerlValue will let the writer of the template perform arbitrary actions on your server as the user that is running the perl process. You have access to all of perl from within your attribute code. You can load modules, open files, delete things, send email, whatever.
If you just want the ability to do simple computations in your templates I suggest you look at Template::TAL::Language::JavaScript, which embeds a nicely sandboxed JavaScript interpreter, and is much safer.
Assuming you're happy with this...
In your perl code, you will have access to a $context hashref, which is the local TAL context. Altering this hash will change the context.
Written by Tom Insam, Copyright 2005 Fotango Ltd. All Rights Reserved
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
To install Template::TAL, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Template::TAL
CPAN shell
perl -MCPAN -e shell install Template::TAL
For more information on module installation, please visit the detailed CPAN module installation guide.