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smarty/docs/en/designers/language-basic-syntax/language-syntax-functions.xml
2005-05-27 16:25:02 +00:00

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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision$ -->
<sect1 id="language.syntax.functions">
<title>Functions</title>
<para>
Each Smarty tag either prints a
<link linkend="language.variables">variable</link> or invokes some sort
of function. Functions are processed and displayed by enclosing the
function and its
<link linkend="language.syntax.attributes">attributes</link>
into delimiters like so: {funcname
attr1="val" attr2="val"}.
</para>
<example>
<title>function syntax</title>
<programlisting>
<![CDATA[
{config_load file="colors.conf"}
{include file="header.tpl"}
{if $highlight_name}
Welcome, <font color="{#fontColor#}">{$name}!</font>
{else}
Welcome, {$name}!
{/if}
{include file="footer.tpl"}
]]>
</programlisting>
</example>
<para>
Both <link linkend="language.builtin.functions">built-in functions</link>
and <link linkend="language.custom.functions">custom functions</link>
have the same syntax within templates.
</para>
<para>Built-in functions are the
<emphasis role="bold">inner</emphasis> workings of Smarty, such as
<link linkend="language.function.if">{if}</link>,
<link linkend="language.function.section">{section}</link> and
<link linkend="language.function.strip">{strip}</link>.
They cannot be modified.
</para>
<para>Custom functions are <emphasis role="bold">additional</emphasis>
functions implemented via <link linkend="plugins">plugins</link>.
They can be modified to your liking, or you can add new ones.
<link linkend="language.function.html.options">{html_options}</link> and
<link linkend="language.function.popup">{popup}</link>
are examples of custom functions.
</para>
</sect1>
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