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{assign} {#language.function.assign}
========
`{assign}` is used for assigning template variables **during the
execution of a template**.
> **Note**
>
> Assignment of variables in-template is essentially placing application
> logic into the presentation that may be better handled in PHP. Use at
> your own discretion.
> **Note**
>
> See also the [`short-form`](#language.function.shortform.assign)
> method of assigning template vars.
**Attributes:**
Attribute Name Type Required Default Description
---------------- -------- ---------- --------- -----------------------------------------------------------------------
var string Yes *n/a* The name of the variable being assigned
value string Yes *n/a* The value being assigned
scope string No *n/a* The scope of the assigned variable: \'parent\',\'root\' or \'global\'
**Option Flags:**
Name Description
--------- -----------------------------------------------------
nocache Assigns the variable with the \'nocache\' attribute
{assign var="name" value="Bob"}
{assign "name" "Bob"} {* short-hand *}
The value of $name is {$name}.
The above example will output:
The value of $name is Bob.
{assign var="name" value="Bob" nocache}
{assign "name" "Bob" nocache} {* short-hand *}
The value of $name is {$name}.
The above example will output:
The value of $name is Bob.
{assign var=running_total value=$running_total+$some_array[$row].some_value}
Variables assigned in the included template will be seen in the
including template.
{include file="sub_template.tpl"}
...
{* display variable assigned in sub_template *}
{$foo}<br>
...
The template above includes the example `sub_template.tpl` below
...
{* foo will be known also in the including template *}
{assign var="foo" value="something" scope=parent}
{* bar is assigned only local in the including template *}
{assign var="bar" value="value"}
...
You can assign a variable to root of the current root tree. The variable
is seen by all templates using the same root tree.
{assign var=foo value="bar" scope="root"}
A global variable is seen by all templates.
{assign var=foo value="bar" scope="global"}
{assign "foo" "bar" scope="global"} {* short-hand *}
To access `{assign}` variables from a php script use
[`getTemplateVars()`](#api.get.template.vars). Here\'s the template that
creates the variable `$foo`.
{assign var="foo" value="Smarty"}
The template variables are only available after/during template
execution as in the following script.
<?php
// this will output nothing as the template has not been executed
echo $smarty->getTemplateVars('foo');
// fetch the template to a variable
$whole_page = $smarty->fetch('index.tpl');
// this will output 'smarty' as the template has been executed
echo $smarty->getTemplateVars('foo');
$smarty->assign('foo','Even smarter');
// this will output 'Even smarter'
echo $smarty->getTemplateVars('foo');
?>
The following functions can also *optionally* assign template variables.
[`{capture}`](#language.function.capture),
[`{include}`](#language.function.include),
[`{include_php}`](#language.function.include.php),
[`{insert}`](#language.function.insert),
[`{counter}`](#language.function.counter),
[`{cycle}`](#language.function.cycle),
[`{eval}`](#language.function.eval),
[`{fetch}`](#language.function.fetch),
[`{math}`](#language.function.math),
[`{textformat}`](#language.function.textformat)
See also [`{$var=...}`](#language.function.shortform.assign),
[`assign()`](#api.assign) and
[`getTemplateVars()`](#api.get.template.vars).
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