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140 lines
5.8 KiB
XML
140 lines
5.8 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision$ -->
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<sect1 id="language.function.insert">
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<title>insert</title>
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<informaltable frame="all">
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<tgroup cols="5">
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<colspec colname="param" align="center" />
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<colspec colname="type" align="center" />
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<colspec colname="required" align="center" />
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<colspec colname="default" align="center" />
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<colspec colname="desc" />
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<thead>
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<row>
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<entry>Attribute Name</entry>
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<entry>Type</entry>
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<entry>Required</entry>
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<entry>Default</entry>
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<entry>Description</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry>name</entry>
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<entry>string</entry>
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<entry>Yes</entry>
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<entry><emphasis>n/a</emphasis></entry>
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<entry>The name of the insert function (insert_name)</entry>
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</row>
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<row>
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<entry>assign</entry>
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<entry>string</entry>
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<entry>No</entry>
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<entry><emphasis>n/a</emphasis></entry>
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<entry>The name of the template variable the output will
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be assigned to</entry>
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</row>
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<row>
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<entry>script</entry>
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<entry>string</entry>
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<entry>No</entry>
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<entry><emphasis>n/a</emphasis></entry>
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<entry>The name of the php script that is included before
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the insert function is called</entry>
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</row>
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<row>
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<entry>[var ...]</entry>
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<entry>[var type]</entry>
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<entry>No</entry>
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<entry><emphasis>n/a</emphasis></entry>
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<entry>variable to pass to insert function</entry>
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</row>
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</tbody>
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</tgroup>
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</informaltable>
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<para>
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Insert tags work much like include tags, except that insert tags
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are not cached when you have template <link
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linkend="caching">caching</link> enabled. They will be
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executed on every invocation of the template.
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</para>
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<para>
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Let's say you have a template with a banner slot at the top of
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the page. The banner can contain any mixture of HTML, images,
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flash, etc. so we can't just use a static link here, and we
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don't want this contents cached with the page. In comes the
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insert tag: the template knows #banner_location_id# and
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#site_id# values (gathered from a config file), and needs to
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call a function to get the banner contents.
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</para>
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<example>
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<title>function insert</title>
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<programlisting>
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{* example of fetching a banner *}
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{insert name="getBanner" lid=#banner_location_id# sid=#site_id#}</programlisting>
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</example>
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<para>
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In this example, we are using the name "getBanner" and passing the
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parameters #banner_location_id# and #site_id#. Smarty will look
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for a function named insert_getBanner() in your PHP application, passing
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the values of #banner_location_id# and #site_id# as the first argument
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in an associative array. All insert function names in
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your application must be prepended with "insert_" to remedy possible
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function name-space conflicts. Your insert_getBanner() function should
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do something with the passed values and return the results. These results
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are then displayed in the template in place of the insert tag.
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In this example, Smarty would call this function:
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insert_getBanner(array("lid" => "12345","sid" => "67890"));
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and display the returned results in place of the insert tag.
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</para>
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<para>
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If you supply the "assign" attribute, the output of the insert tag
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will be assigned to this template variable instead of being output
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to the template. NOTE: assigning the output to a template variable
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isn't too useful with caching enabled.
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</para>
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<para>
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If you supply the "script" attribute, this php script will be
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included (only once) before the insert function is executed. This
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is the case where the insert function may not exist yet, and a php
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script must be included first to make it work. The path can be
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either absolute, or relative to $trusted_dir. When security is
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enabled, the script must reside in $trusted_dir.
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</para>
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<para>
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The Smarty object is passed as the second argument. This way you
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can reference and modify information in the Smarty object from
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within the insert function.
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</para>
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<note>
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<title>Technical Note</title>
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<para>
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It is possible to have portions of the template not
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cached. If you have <link linkend="caching">caching</link>
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turned on, insert tags will not be cached. They will run
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dynamically every time the page is created, even within cached
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pages. This works good for things like banners, polls, live
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weather, search results, user feedback areas, etc.
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</para>
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</note>
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</sect1>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"../../../../manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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--> |