mirror of
https://github.com/smarty-php/smarty.git
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107 lines
3.2 KiB
XML
107 lines
3.2 KiB
XML
<?xml version="1.0" encoding="windows-1251"?>
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<!-- $Revision$ -->
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<!-- EN-Revision: 1.3 Maintainer: tony2001 Status: ready -->
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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></refpurpose>
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</refnamediv>
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<refsect1>
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<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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Âîçâðàùàåò true åñëè ñóùåñòâóåò êýø äëÿ óêàçàííîãî øàáëîíà.
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Ðàáîòàåò òîëüêî â òîì ñëó÷àå, åñëè çíà÷åíèå <link
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linkend="variable.caching">caching</link> óñòàíîâëåíî â true.
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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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// îáðàùàåìñÿ ê ÁÄ, íàçíà÷àåì ïåðåìåííûå
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}
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$smarty->display("index.tpl");
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?>
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]]>
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</programlisting>
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</example>
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<para>
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Òàêæå âû ìîæåòå ïåðåäàâàòü cache id â êà÷åñòâå íåîáÿçàòåëüíîãî âòîðîãî
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ïàðàìåòðà, åñëè ó âàñ èñïîëüçóåòñÿ ìíîæåñòâåííîå êýøèðîâàíèå øàáëîíà.
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</para>
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<para>
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Òàêæå âû ìîæåòå ïåðåäàâàòü compile id â êà÷åñòâå íåîáÿçàòåëüíîãî òðåòüåãî ïàðàìåòðà.
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Åñëè âû íå ïåðåäàäèòå ýòîò ïàðàìåòð, áóäåò èñïîëüçîâàí òåêóùèé
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<link linkend="variable.compile.id">$compile_id</link>.
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</para>
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<para>
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Åñëè âû íå õîòèòå ïåðåäàâàòü cache id, íî õîòèòå ïåðåäàòü compile
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id, âû äîëæíû ïåðåäàòü <literal>null</literal> â êà÷åñòâå cache id.
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</para>
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<example>
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<title>is_cached ïðè ìíîæåñòâåííîì êýøèðîâàíèè øàáëîíà</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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// îáðàùàåìñÿ ê ÁÄ, íàçíà÷àåì ïåðåìåííûå
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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>Òåõíè÷åñêîå çàìå÷àíèå</title>
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<para>
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Åñëè <literal>is_cached</literal> âîçâðàùàåò true, ïðè ýòîì îíà çàãðóæàåò
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êýøèðîâàííûé âûâîä è õðàíèò åãî â ïàìÿòè. Ëþáûå ïîñëåäóþùèå âûçîâû
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<link linkend="api.display">display()</link> èëè
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<link linkend="api.fetch">fetch()</link>
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áóäóò âîçâðàùàòü ýòîò õðàíèìûé â ïàìÿòè âûâîä è íå áóäóò ïûòàòüñÿ ïåðåçàãðóçèòü
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ôàéë êýøà. Ýòî ïðåäîòâðàùàåò íåïðèÿòíóþ ñèòóàöèþ, êîòîðàÿ ìîæåò âîçíèêíóòü åñëè
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äðóãîé ïðîöåññ î÷èùàåò êýø ìåæäó âûçîâàìè is_cached è
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display â ïðåäûäóùåì ïðèìåðå. Ýòî òàêæå îçíà÷àåò, ÷òî
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<link linkend="api.clear.cache">clear_cache()</link>
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è äðóãèå èçìåíåíèÿ íàñòðîåê êýøèðîâàíèÿ ìîãóò íå âñòóïèòü â ñèëó ïîñëå òîãî, êàê
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<literal>is_cached</literal> âåðíóëà true.
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</para>
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</note>
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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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