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-{function} {#language.function.function}
-==========
-
-`{function}` is used to create functions within a template and call them
-just like a plugin function. Instead of writing a plugin that generates
-presentational content, keeping it in the template is often a more
-manageable choice. It also simplifies data traversal, such as deeply
-nested menus.
-
-> **Note**
->
-> Template functions are defined global. Since the Smarty compiler is a
-> single-pass compiler, The [`{call}`](#language.function.call) tag must
-> be used to call a template function defined externally from the given
-> template. Otherwise you can directly use the function as
-> `{funcname ...}` in the template.
-
--   The `{function}` tag must have the `name` attribute which contains
-    the the name of the template function. A tag with this name can be
-    used to call the template function.
-
--   Default values for variables can be passed to the template function
-    as [attributes](#language.syntax.attributes). Like in PHP function
-    declarations you can only use scalar values as default. The default
-    values can be overwritten when the template function is being
-    called.
-
--   You can use all variables from the calling template inside the
-    template function. Changes to variables or new created variables
-    inside the template function have local scope and are not visible
-    inside the calling template after the template function is executed.
-
-**Attributes:**
-
-   Attribute Name       Type       Required   Default  Description
-  ---------------- -------------- ---------- --------- ---------------------------------------------------------------
-        name           string        Yes       *n/a*   The name of the template function
-    \[var \...\]    \[var type\]      No       *n/a*   default variable value to pass local to the template function
-
-> **Note**
->
-> You can pass any number of parameter to the template function when it
-> is called. The parameter variables must not be declared in the
-> `{funcname ...}` tag unless you what to use default values. Default
-> values must be scalar and can not be variable. Variables must be
-> passed when the template is called.
-
-
-    {* define the function *}
-    {function name=menu level=0}
-    {function menu level=0}          {* short-hand *}
-      <ul class="level{$level}">
-      {foreach $data as $entry}
-        {if is_array($entry)}
-          <li>{$entry@key}</li>
-          {menu data=$entry level=$level+1}
-        {else}
-          <li>{$entry}</li>
-        {/if}
-      {/foreach}
-      </ul>
-    {/function}
-
-    {* create an array to demonstrate *}
-    {$menu = ['item1','item2','item3' => ['item3-1','item3-2','item3-3' =>
-    ['item3-3-1','item3-3-2']],'item4']}
-
-    {* run the array through the function *}
-    {menu data=$menu}
-
-      
-
-Will generate the following output
-
-
-    * item1
-    * item2
-    * item3
-          o item3-1
-          o item3-2
-          o item3-3
-                + item3-3-1
-                + item3-3-2
-    * item4
-
-      
-
-See also [`{call}`](#language.function.call)