smarty/docs/en/designers/language-basic-syntax/language-escaping.xml

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<sect1 id="language.escaping">
 <title>Escaping Smarty Parsing</title>
 <para>
  It is sometimes desirable or even necessary to have Smarty ignore sections it
  would otherwise parse. A classic example is embedding Javascript or CSS code in
  a template. The problem arises as those languages use the { and } characters
  which are also the default delimiters for Smarty.
 </para>

 <para>
  The simplest thing is to avoid the situation altogether by separating your Javascript
  and CSS code into their own files and then using standard HTML methods to access them.
 </para>

 <para>
  Including literal content is possible using <link 
  linkend="language.function.literal">{literal} .. {/literal}</link> blocks.
  Similar to HTML entity usage, you can use <link 
  linkend="language.function.ldelim">{ldelim}</link> and <link 
  linkend="language.function.ldelim">{rdelim}</link> to display the current delimiters.
 </para>

 <para>
  It is often convenient to simply change Smarty's <link 
  linkend="variable.left.delimiter">$left_delimiter</link> and
  <link linkend="variable.right.delimiter">$right_delimiter</link>.
 </para>
 <example>
  <title>changing delimiters example</title>
  <programlisting role="php">
<![CDATA[
<?php

$smarty = new Smarty;
$smarty->left_delimiter = '<!--{';
$smarty->right_delimiter = '}-->';
$smarty->assign('foo', 'bar');
$smarty->display('example.tpl');

?>
]]>
  </programlisting>
  <para>
   Where example.tpl is:
  </para>
  <programlisting>
<![CDATA[
<script language="javascript">
var foo = <!--{$foo}-->;
function dosomething() {
    alert("foo is " + foo);
}
dosomething();
</script>
]]>
  </programlisting>
 </example>
</sect1>
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