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<h1 class="headline">Template::Manual::Plugins</h1>
<h2 class="subhead">Standard plugins</h1>
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<ul class="toc">
<li class=""><a href="#TEMPLATE_TOOLKIT_PLUGINS">TEMPLATE TOOLKIT PLUGINS</a></li>
<li class="sub"><a href="#section_Assert">Assert</a></li>
<li class="sub"><a href="#section_CGI">CGI</a></li>
<li class="sub"><a href="#section_Datafile">Datafile</a></li>
<li class="sub"><a href="#section_Date">Date</a></li>
<li class="sub"><a href="#section_Directory">Directory</a></li>
<li class="sub"><a href="#section_DBI">DBI</a></li>
<li class="sub"><a href="#section_Dumper">Dumper</a></li>
<li class="sub"><a href="#section_File">File</a></li>
<li class="sub"><a href="#section_Filter">Filter</a></li>
<li class="sub"><a href="#section_Format">Format</a></li>
<li class="sub"><a href="#section_GD">GD</a></li>
<li class="sub"><a href="#section_HTML">HTML</a></li>
<li class="sub"><a href="#section_Iterator">Iterator</a></li>
<li class="sub"><a href="#section_Pod">Pod</a></li>
<li class="sub"><a href="#section_Scalar">Scalar</a></li>
<li class="sub"><a href="#section_String">String</a></li>
<li class="sub"><a href="#section_Table">Table</a></li>
<li class="sub"><a href="#section_URL">URL</a></li>
<li class="sub"><a href="#section_Wrap">Wrap</a></li>
<li class="sub"><a href="#section_XML">XML</a></li>
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<h1 id="TEMPLATE_TOOLKIT_PLUGINS" onclick="switch_section(this)" title="Click title to show/hide section content.">TEMPLATE TOOLKIT PLUGINS</h1>
<a href="#body" class="top" title="Back up to the top of the page" >Top</a>
</div>
<div class="body">
<p>
The following plugin modules are distributed with the Template Toolkit.
Some of the plugins interface to external modules (detailed below) which
should be downloaded from any CPAN site and installed before using the
plugin.
</p>
<div class="subsection">
<div class="head">
<h2 id="section_Assert" onclick="switch_subsection(this)" title="Click title to show/hide sub-section content.">Assert</h2>
<a href="#body" class="top" title="Back up to the top of the page" >Top</a>
</div>
<div class="body">
<p>
New in 2.20! The <a href="../modules/Template/Plugin/Assert.html">Assert</a> plugin adds an <code>assert</code> virtual method that
you can use to catch undefined values.
</p>
<p>
For example, consider this dotop:
</p>
<pre><span class="tt">[% user.name %]</span></pre>
<p>
If <code>user.name</code> is an undefined value then TT will silently
ignore the fact and print nothing. If you <code>USE</code> the
<code>assert</code> plugin then you can add the <code>assert</code>
vmethod between the <code>user</code> and <code>name</code> elements,
like so:
</p>
<pre><span class="tt">[% user.assert.name %]</span></pre>
<p>
Now, if <code>user.name</code> is an undefined value, an exception will
be thrown:
</p>
<pre>assert error - undefined value for name</pre>
</div>
</div> <div class="subsection">
<div class="head">
<h2 id="section_CGI" onclick="switch_subsection(this)" title="Click title to show/hide sub-section content.">CGI</h2>
<a href="#body" class="top" title="Back up to the top of the page" >Top</a>
</div>
<div class="body">
<p>
The <a href="../modules/Template/Plugin/CGI.html">CGI</a> plugin
is a wrapper around Lincoln Stein's CGI.pm module. The plugin is
distributed with the Template Toolkit (see <a href="../modules/Template/Plugin/CGI.html">Template::Plugin::CGI</a>) and
the <a href="http://search.cpan.org/search?query=CGI&mode=all">CGI</a> module itself is distributed
with recent versions Perl, or is available from CPAN.
</p>
<pre><span class="tt">[% USE CGI %]</span>
<span class="tt">[% CGI.param('param_name') %]</span>
<span class="tt">[% CGI.start_form %]</span>
<span class="tt">[% CGI.popup_menu( Name => 'color',
Values => [ 'Green', 'Brown' ] ) %]</span>
<span class="tt">[% CGI.end_form %]</span></pre>
</div>
</div> <div class="subsection">
<div class="head">
<h2 id="section_Datafile" onclick="switch_subsection(this)" title="Click title to show/hide sub-section content.">Datafile</h2>
<a href="#body" class="top" title="Back up to the top of the page" >Top</a>
</div>
<div class="body">
<p>
Provides an interface to data stored in a plain text file in a simple
delimited format. The first line in the file specifies field names which
should be delimiter by any non-word character sequence. Subsequent lines
define data using the same delimiter as in the first line. Blank lines
and comments (lines starting '#') are ignored. See <a href="../modules/Template/Plugin/Datafile.html">Template::Plugin::Datafile</a> for further details.
</p>
<p>
/tmp/mydata:
</p>
<pre># define names for each field
id : email : name : tel
# here's the data
fred : fred@here.com : Fred Smith : 555-1234
bill : bill@here.com : Bill White : 555-5678</pre>
<p>
example:
</p>
<pre><span class="tt">[% USE userlist = datafile('/tmp/mydata') %]</span>
<span class="tt">[% FOREACH user = userlist %]</span>
<span class="tt">[% user.name %]</span> (<span class="tt">[% user.id %]</span>)
<span class="tt">[% END %]</span></pre>
</div>
</div> <div class="subsection">
<div class="head">
<h2 id="section_Date" onclick="switch_subsection(this)" title="Click title to show/hide sub-section content.">Date</h2>
<a href="#body" class="top" title="Back up to the top of the page" >Top</a>
</div>
<div class="body">
<p>
The <a href="../modules/Template/Plugin/Date.html">Date</a> plugin
provides an easy way to generate formatted time and date strings by
delegating to the <a href="http://search.cpan.org/search?query=POSIX&mode=all">POSIX</a>
<code>strftime()</code> routine. See <a href="../modules/Template/Plugin/Date.html">Template::Plugin::Date</a> and
<a href="http://search.cpan.org/search?query=POSIX&mode=all">POSIX</a> for further details.
</p>
<pre><span class="tt">[% USE date %]</span>
<span class="tt">[% date.format %]</span> # current time/date
File last modified: <span class="tt">[% date.format(template.modtime) %]</span></pre>
</div>
</div> <div class="subsection">
<div class="head">
<h2 id="section_Directory" onclick="switch_subsection(this)" title="Click title to show/hide sub-section content.">Directory</h2>
<a href="#body" class="top" title="Back up to the top of the page" >Top</a>
</div>
<div class="body">
<p>
The <a href="../modules/Template/Plugin/Directory.html">Directory</a> plugin provides a simple interface to a directory and
the files within it. See <a href="../modules/Template/Plugin/Directory.html">Template::Plugin::Directory</a> for further details.
</p>
<pre><span class="tt">[% USE dir = Directory('/tmp') %]</span>
<span class="tt">[% FOREACH file = dir.files %]</span>
# all the plain files in the directory
<span class="tt">[% END %]</span>
<span class="tt">[% FOREACH file = dir.dirs %]</span>
# all the sub-directories
<span class="tt">[% END %]</span></pre>
</div>
</div> <div class="subsection">
<div class="head">
<h2 id="section_DBI" onclick="switch_subsection(this)" title="Click title to show/hide sub-section content.">DBI</h2>
<a href="#body" class="top" title="Back up to the top of the page" >Top</a>
</div>
<div class="body">
<p>
The <code>DBI</code> plugin is no longer distributed as part of the
Template Toolkit (as of version 2.15). It is now available as a separate
<a href="http://search.cpan.org/search?query=Template::DBI&mode=all">Template::DBI</a>
distribution from CPAN.
</p>
</div>
</div> <div class="subsection">
<div class="head">
<h2 id="section_Dumper" onclick="switch_subsection(this)" title="Click title to show/hide sub-section content.">Dumper</h2>
<a href="#body" class="top" title="Back up to the top of the page" >Top</a>
</div>
<div class="body">
<p>
The <a href="../modules/Template/Plugin/Dumper.html">Dumper</a>
plugin provides an interface to the Data::Dumper module. See <a href="../modules/Template/Plugin/Dumper.html">Template::Plugin::Dumper</a>
and <a href="http://search.cpan.org/search?query=Data::Dumper&mode=all">Data::Dumper</a> for futher
details.
</p>
<pre><span class="tt">[% USE dumper(indent=0, pad="<br>") %]</span>
<span class="tt">[% dumper.dump(myvar, yourvar) %]</span></pre>
</div>
</div> <div class="subsection">
<div class="head">
<h2 id="section_File" onclick="switch_subsection(this)" title="Click title to show/hide sub-section content.">File</h2>
<a href="#body" class="top" title="Back up to the top of the page" >Top</a>
</div>
<div class="body">
<p>
The <a href="../modules/Template/Plugin/File.html">File</a> plugin
provides a general abstraction for files and can be used to fetch
information about specific files within a filesystem. See <a href="../modules/Template/Plugin/File.html">Template::Plugin::File</a> for
further details.
</p>
<pre><span class="tt">[% USE File('/tmp/foo.html') %]</span>
<span class="tt">[% File.name %]</span> # foo.html
<span class="tt">[% File.dir %]</span> # /tmp
<span class="tt">[% File.mtime %]</span> # modification time</pre>
</div>
</div> <div class="subsection">
<div class="head">
<h2 id="section_Filter" onclick="switch_subsection(this)" title="Click title to show/hide sub-section content.">Filter</h2>
<a href="#body" class="top" title="Back up to the top of the page" >Top</a>
</div>
<div class="body">
<p>
This module implements a base class plugin which can be subclassed to
easily create your own modules that define and install new filters.
</p>
<pre>package MyOrg::Template::Plugin::MyFilter;
use Template::Plugin::Filter;
use base qw( Template::Plugin::Filter );
sub filter {
my ($self, $text) = @_;
# ...mungify $text...
return $text;
}</pre>
<p>
Example of use:
</p>
<pre># now load it...
<span class="tt">[% USE MyFilter %]</span>
# ...and use the returned object as a filter
<span class="tt">[% FILTER $MyFilter %]</span>
...
<span class="tt">[% END %]</span></pre>
<p>
See <a href="../modules/Template/Plugin/Filter.html">Template::Plugin::Filter</a> for further details.
</p>
</div>
</div> <div class="subsection">
<div class="head">
<h2 id="section_Format" onclick="switch_subsection(this)" title="Click title to show/hide sub-section content.">Format</h2>
<a href="#body" class="top" title="Back up to the top of the page" >Top</a>
</div>
<div class="body">
<p>
The <a href="../modules/Template/Plugin/Format.html">Format</a>
plugin provides a simple way to format text according to a
<code>printf()</code>-like format. See <a href="../modules/Template/Plugin/Format.html">Template::Plugin::Format</a>
for further details.
</p>
<pre><span class="tt">[% USE bold = format('<b>%s</b>') %]</span>
<span class="tt">[% bold('Hello') %]</span></pre>
</div>
</div> <div class="subsection">
<div class="head">
<h2 id="section_GD" onclick="switch_subsection(this)" title="Click title to show/hide sub-section content.">GD</h2>
<a href="#body" class="top" title="Back up to the top of the page" >Top</a>
</div>
<div class="body">
<p>
The <code>GD</code> plugins are no longer part of the core Template
Toolkit distribution. They are now available from CPAN in a separate <a
href="http://search.cpan.org/search?query=Template::GD&mode=all">Template::GD</a> distribution.
</p>
</div>
</div> <div class="subsection">
<div class="head">
<h2 id="section_HTML" onclick="switch_subsection(this)" title="Click title to show/hide sub-section content.">HTML</h2>
<a href="#body" class="top" title="Back up to the top of the page" >Top</a>
</div>
<div class="body">
<p>
The <a href="../modules/Template/Plugin/HTML.html">HTML</a> plugin
is very basic, implementing a few useful methods for generating HTML. It
is likely to be extended in the future or integrated with a larger
project to generate HTML elements in a generic way.
</p>
<pre><span class="tt">[% USE HTML %]</span>
<span class="tt">[% HTML.escape("if (a < b && c > d) ..." %]</span>
<span class="tt">[% HTML.attributes(border => 1, cellpadding => 2) %]</span>
<span class="tt">[% HTML.element(table => { border => 1, cellpadding => 2 }) %]</span></pre>
<p>
See <a href="../modules/Template/Plugin/HTML.html">Template::Plugin::HTML</a> for further details.
</p>
</div>
</div> <div class="subsection">
<div class="head">
<h2 id="section_Iterator" onclick="switch_subsection(this)" title="Click title to show/hide sub-section content.">Iterator</h2>
<a href="#body" class="top" title="Back up to the top of the page" >Top</a>
</div>
<div class="body">
<p>
The <a href="../modules/Template/Plugin/Iterator.html">Iterator</a> plugin provides a way to create a <a href="../modules/Template/Iterator.html">Template::Iterator</a> object to
iterate over a data set. An iterator is created automatically by the
<code>FOREACH</code> directive and is aliased to the <code>loop</code>
variable. This plugin allows an iterator to be explicitly created with a
given name, or the default plugin name, <code>iterator</code>. See <a
href="../modules/Template/Plugin/Iterator.html">Template::Plugin::Iterator</a> for further details.
</p>
<pre><span class="tt">[% USE iterator(list, args) %]</span>
<span class="tt">[% FOREACH item = iterator %]</span>
<span class="tt">[% '<ul>' IF iterator.first %]</span>
<li><span class="tt">[% item %]</span>
<span class="tt">[% '</ul>' IF iterator.last %]</span>
<span class="tt">[% END %]</span></pre>
</div>
</div> <div class="subsection">
<div class="head">
<h2 id="section_Pod" onclick="switch_subsection(this)" title="Click title to show/hide sub-section content.">Pod</h2>
<a href="#body" class="top" title="Back up to the top of the page" >Top</a>
</div>
<div class="body">
<p>
This plugin provides an interface to the <a href="http://search.cpan.org/search?query=Pod::POM&mode=all">Pod::POM</a> module which parses POD documents into an internal
object model which can then be traversed and presented through the
Template Toolkit.
</p>
<pre><span class="tt">[% USE Pod(podfile) %]</span>
<span class="tt">[% FOREACH head1 = Pod.head1;
FOREACH head2 = head1/head2;
...
END;
END
%]</span></pre>
</div>
</div> <div class="subsection">
<div class="head">
<h2 id="section_Scalar" onclick="switch_subsection(this)" title="Click title to show/hide sub-section content.">Scalar</h2>
<a href="#body" class="top" title="Back up to the top of the page" >Top</a>
</div>
<div class="body">
<p>
The Template Toolkit calls user-defined subroutines and object methods
using Perl's array context by default.
</p>
<pre># TT2 calls object methods in array context by default
<span class="tt">[% object.method %]</span></pre>
<p>
This plugin module provides a way for you to call subroutines and methods
in scalar context.
</p>
<pre><span class="tt">[% USE scalar %]</span>
# force it to use scalar context
<span class="tt">[% object.scalar.method %]</span>
# also works with subroutine references
<span class="tt">[% scalar.my_sub_ref %]</span></pre>
</div>
</div> <div class="subsection">
<div class="head">
<h2 id="section_String" onclick="switch_subsection(this)" title="Click title to show/hide sub-section content.">String</h2>
<a href="#body" class="top" title="Back up to the top of the page" >Top</a>
</div>
<div class="body">
<p>
The <a href="../modules/Template/Plugin/String.html">String</a>
plugin implements an object-oriented interface for manipulating strings.
See <a href="../modules/Template/Plugin/String.html">Template::Plugin::String</a> for further details.
</p>
<pre><span class="tt">[% USE String 'Hello' %]</span>
<span class="tt">[% String.append(' World') %]</span>
<span class="tt">[% msg = String.new('Another string') %]</span>
<span class="tt">[% msg.replace('string', 'text') %]</span>
The string "<span class="tt">[% msg %]</span>" is <span class="tt">[% msg.length %]</span> characters long.</pre>
</div>
</div> <div class="subsection">
<div class="head">
<h2 id="section_Table" onclick="switch_subsection(this)" title="Click title to show/hide sub-section content.">Table</h2>
<a href="#body" class="top" title="Back up to the top of the page" >Top</a>
</div>
<div class="body">
<p>
The <a href="../modules/Template/Plugin/Table.html">Table</a>
plugin allows you to format a list of data items into a virtual table by
specifying a fixed number of rows or columns, with an optional overlap.
See <a href="../modules/Template/Plugin/Table.html">Template::Plugin::Table</a> for further details.
</p>
<pre><span class="tt">[% USE table(list, rows=10, overlap=1) %]</span>
<span class="tt">[% FOREACH item = table.col(3) %]</span>
<span class="tt">[% item %]</span>
<span class="tt">[% END %]</span></pre>
</div>
</div> <div class="subsection">
<div class="head">
<h2 id="section_URL" onclick="switch_subsection(this)" title="Click title to show/hide sub-section content.">URL</h2>
<a href="#body" class="top" title="Back up to the top of the page" >Top</a>
</div>
<div class="body">
<p>
The <a href="../modules/Template/Plugin/URL.html">URL</a> plugin
provides a simple way of contructing URLs from a base part and a variable
set of parameters. See <a href="../modules/Template/Plugin/URL.html">Template::Plugin::URL</a> for further details.
</p>
<pre><span class="tt">[% USE mycgi = url('/cgi-bin/bar.pl', debug=1) %]</span>
<span class="tt">[% mycgi %]</span>
# ==> /cgi/bin/bar.pl?debug=1
<span class="tt">[% mycgi(mode='submit') %]</span>
# ==> /cgi/bin/bar.pl?mode=submit&debug=1</pre>
</div>
</div> <div class="subsection">
<div class="head">
<h2 id="section_Wrap" onclick="switch_subsection(this)" title="Click title to show/hide sub-section content.">Wrap</h2>
<a href="#body" class="top" title="Back up to the top of the page" >Top</a>
</div>
<div class="body">
<p>
The <a href="../modules/Template/Plugin/Wrap.html">Wrap</a> plugin
uses the <a href="http://search.cpan.org/search?query=Text::Wrap&mode=all">Text::Wrap</a> module to
provide simple paragraph formatting. See <a href="../modules/Template/Plugin/Wrap.html">Template::Plugin::Wrap</a> and
<a href="http://search.cpan.org/search?query=Text::Wrap&mode=all">Text::Wrap</a> for further
details.
</p>
<pre><span class="tt">[% USE wrap %]</span>
<span class="tt">[% wrap(mytext, 40, '* ', ' ') %]</span> # use wrap sub
<span class="tt">[% mytext FILTER wrap(40) -%]</span> # or wrap FILTER</pre>
<p>
The <code>Text::Wrap</code> module is available from CPAN:
</p>
<pre>http://www.cpan.org/modules/by-module/Text/</pre>
</div>
</div> <div class="subsection">
<div class="head">
<h2 id="section_XML" onclick="switch_subsection(this)" title="Click title to show/hide sub-section content.">XML</h2>
<a href="#body" class="top" title="Back up to the top of the page" >Top</a>
</div>
<div class="body">
<p>
The <code>XML::DOM</code>, <code>XML::RSS</code>,
<code>XML::Simple</code> and <code>XML::XPath</code> plugins are no
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