Files
smarty/docs/en/designers/language-builtin-functions/language-function-capture.xml

136 lines
4.1 KiB
XML

<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision$ -->
<sect1 id="language.function.capture">
<title>{capture}</title>
<para>
<varname>{capture}</varname> is used to collect the output of the template between the
tags into a variable instead of displaying it. Any content between
<varname>{capture name='foo'}</varname> and <varname>{/capture}</varname> is collected
into the variable specified in the <parameter>name</parameter> attribute.
</para>
<para>The captured content can be used in the
template from the variable <link
linkend="language.variables.smarty.capture"><parameter>$smarty.capture.foo</parameter></link>
where <quote>foo</quote> is the value passed in the <parameter>name</parameter> attribute.
If you do not supply the <parameter>name</parameter> attribute, then <quote>default</quote> will
be used as the name ie <parameter>$smarty.capture.default</parameter>.
</para>
<para><varname>{capture}'s</varname> can be nested.
</para>
<informaltable frame="all">
<tgroup cols="5">
<colspec colname="param" align="center" />
<colspec colname="type" align="center" />
<colspec colname="required" align="center" />
<colspec colname="default" align="center" />
<colspec colname="desc" />
<thead>
<row>
<entry>Attribute Name</entry>
<entry>Type</entry>
<entry>Required</entry>
<entry>Default</entry>
<entry>Description</entry>
</row>
</thead>
<tbody>
<row>
<entry>name</entry>
<entry>string</entry>
<entry>no</entry>
<entry><emphasis>default</emphasis></entry>
<entry>The name of the captured block</entry>
</row>
<row>
<entry>assign</entry>
<entry>string</entry>
<entry>No</entry>
<entry><emphasis>n/a</emphasis></entry>
<entry>The variable name where to assign the captured output to</entry>
</row>
</tbody>
</tgroup>
</informaltable>
<caution>
<para>
Be careful when capturing <link
linkend="language.function.insert"><varname>{insert}</varname></link>
output. If you have
<link linkend="caching"><parameter>$caching</parameter></link>
enabled and you have
<link linkend="language.function.insert"><varname>{insert}</varname></link>
commands that you expect to run
within cached content, do not capture this content.
</para>
</caution>
<para>
<example>
<title>{capture} with a the name attribute</title>
<programlisting>
<![CDATA[
{* we don't want to print a div tag unless content is displayed *}
{capture name=banner}
{include file='get_banner.tpl'}
{/capture}
{if $smarty.capture.banner ne ''}
<div id="banner">{$smarty.capture.banner}</div>
{/if}
]]>
</programlisting>
</example>
<example>
<title>{capture} into a template variable</title>
<para>This example also demonstrates the
<link linkend="language.function.popup"><varname>{popup}</varname></link>
function</para>
<programlisting>
<![CDATA[
{capture name=some_content assign=popText}
The server is {$smarty.server.SERVER_NAME|upper} at {$smarty.server.SERVER_ADDR}<br>
Your ip is {$smarty.server.REMOTE_ADDR}.
{/capture}
<a href="#" {popup caption='Server Info' text=$popText}>help</a>
]]>
</programlisting>
</example>
</para>
<para>
See also
<link
linkend="language.variables.smarty.capture"><parameter>$smarty.capture</parameter></link>,
<link linkend="language.function.eval"><varname>{eval}</varname></link>,
<link linkend="language.function.fetch"><varname>{fetch}</varname></link>,
<link linkend="api.fetch"><varname>fetch()</varname></link>
and <link linkend="language.function.assign"><varname>{assign}</varname></link>.
</para>
</sect1>
<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-omittag:t
sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
indent-tabs-mode:nil
sgml-parent-document:nil
sgml-default-dtd-file:"../../../../manual.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:nil
sgml-local-ecat-files:nil
End:
vim600: syn=xml fen fdm=syntax fdl=2 si
vim: et tw=78 syn=sgml
vi: ts=1 sw=1
-->