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								<?xml version="1.0" encoding="iso-8859-1"?>
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								<!-- $Revision$ -->
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								<refentry id="api.is.cached">
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								 <refnamediv>
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								  <refname>is_cached()</refname>
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								  <refpurpose>Retorna true si hay cache valido para ese template</refpurpose>
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								 </refnamediv>
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								 <refsect1>
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								  <title>Descripci<EFBFBD>n </title>
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								  <methodsynopsis>
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								   <type>bool</type><methodname>is_cached</methodname>
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								   <methodparam><type>string</type><parameter>template</parameter></methodparam>
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								   <methodparam choice="opt"><type>string</type><parameter>cache_id</parameter></methodparam>
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								   <methodparam choice="opt"><type>string</type><parameter>compile_id</parameter></methodparam>
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								  </methodsynopsis>
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								  <para>
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								   Esto solamente funciona si <link linkend="variable.caching">
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								   caching</link> est<73> asignado a true.
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								  ver tambi<62>n <link linkend="caching">caching section</link>.
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								  </para>
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								  <example>
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								   <title>is_cached()</title>
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								   <programlisting role="php">
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								<![CDATA[
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								<?php
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								$smarty->caching = true;
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								if(!$smarty->is_cached("index.tpl")) {
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								// do database calls, assign vars here
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								}
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								$smarty->display("index.tpl");
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								?>
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								]]>
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								   </programlisting>
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								  </example>
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								  <para>
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								   Usted tambi<62>n puede pasar un identificador de $cache como un 
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								   segundo par<61>metro opcional en el caso que usted quiera 
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								   <link linkend="caching.multiple.caches">multiples caches</link> 
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								   para el template dado.
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								  </para>
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								  <para>
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								   Usted puede proporcionar el identidicador como un tercer parametro 
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								   opcional. Si usted omite ese parametro la persistencia del  
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								   <link linkend="variable.compile.id">$compile_id</link> es usada.
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								  </para>
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								  <para>
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								   Si usted no quiere pasar el  
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								   <link linkend="variable.compile.id">identificador de cache</link> 
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								   solamente quiere pasar el compile id debe pasar <literal>null</literal>
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								   como el identidficador de cache.
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								  </para>
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								  <example>
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								   <title>is_cached() con templates con multiple-cache</title>
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								   <programlisting role="php">
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								<![CDATA[
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								<?php
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								$smarty->caching = true;
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								if(!$smarty->is_cached("index.tpl", "FrontPage")) {
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								  // do database calls, assign vars here
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								}
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								$smarty->display("index.tpl", "FrontPage");
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								?>
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								]]>
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								   </programlisting>
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								  </example>
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								  <note>
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								  <title>Nota t<>cnica</title>
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								  <para>
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								   Si <literal>is_cached</literal> retorna true el carga actualmente 
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								   la salida del cache y lo guarda internamente. cualquier subsecuente
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								   llama a <link linkend="api.display">display()</link> o
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								   <link linkend="api.fetch">fetch()</link> y retorna este internamente 
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								   guardando la salida y no intenta volver a cargar el archivo del cache.
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								   Esto previene una condicion de la carrera que puede ocurrir cuando un
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								   segundo proceso limpie el cache entre las llamadas a is_cached mostradas
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								   en el ejemplo de arriba. Esto significa tambien llamar al 
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								   <link linkend="api.clear.cache">clear_cache()</link> y otros cambios
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								   en el cache-settings que no tiene efecto despues que 
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								   <literal>is_cached</literal> retorna true.
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								  </para>
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								  </note>
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								    <para>
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								    Ver tambi<62>n 
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								    <link linkend="api.clear.cache">clear_cache()</link>,
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								    <link linkend="api.clear.all.cache">clear_all_cache()</link>,
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								    y 
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								    <link linkend="caching">caching section</link>.
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								  </para>
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											2004-10-07 18:50:52 +00:00
										 
									 
								 
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								 </refsect1>
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								</refentry>
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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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								-->
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