smarty/docs/pt_BR/designers/language-custom-functions/language-function-eval.xml

<?xml version="1.0" encoding="iso-8859-1"?>
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		<sect1 id="language.function.eval">
			<title>eval</title>
            <informaltable frame="all">
                <tgroup cols="5">
                <colspec colname="param" align="center" />
                <colspec colname="type" align="center" />
                <colspec colname="required" align="center" />
                <colspec colname="default" align="center" />
                <colspec colname="desc" />
                <thead>
                    <row>
                        <entry>Nome do Atributo</entry>
                        <entry>Tipo</entry>
                        <entry>Obrigat<EFBFBD>rio</entry>       
                        <entry>Padr<EFBFBD>o</entry>
                        <entry>Descri<EFBFBD><EFBFBD>o</entry>
                    </row>
                </thead>
                <tbody>
                    <row>
                        <entry>var</entry>
                        <entry>mixed</entry>
                        <entry>Sim</entry>
                        <entry><emphasis>n/a</emphasis></entry>
                        <entry>Vari<EFBFBD>vel (ou string) para avaliar</entry>
                    </row>
                    <row>
                        <entry>assign</entry>
                        <entry>string</entry>
                        <entry>N<EFBFBD>o</entry>
                        <entry><emphasis>n/a</emphasis></entry>
                        <entry>A vari<72>vel de template que
                        receber<65> a sa<73>da</entry>
                    </row>
                </tbody>
                </tgroup>
            </informaltable>
			<para>
			eval <20> usado para avaliar uma vari<72>vel como template. Isto pode ser usado para
			coisas como embutir tags/vari<72>veis de template dentro de vari<72>veis
			ou tags/vari<72>veis dentro de vari<72>veis em um arquivo de configura<72><61>o.
			</para>
			<para>
			 Se voc<6F> indicar o atributo especial "assign", a sa<73>da da fun<75><6E>o
			 eval ir<69> para esta vari<72>vel de template ao
			 inv<6E>s de aparecer no template.
			</para>
			<note>
			<title>Nota T<>cnica</title>
			<para>
			 Vari<72>veis avaliadas s<>o tratadas igual a templates. Elas seguem
			 o mesmo funcionamento para escapar e para seguran<61>a como
			 se fossem templates.
			</para>
			</note>
			<note>
			<title>Nota T<>cnica</title>
			<para>
			 Vari<72>veis avaliadas s<>o compiladas a cada invoca<63><61>o, as vers<72>es
			 compiladas n<>o s<>o salvas. Entretando, se voc<6F> tiver o cache ativado,
			 a sa<73>da vai ficar no cache junto com o resto do template.
			</para>
			</note>
<example>
<title>eval</title>
<programlisting>
<![CDATA[
setup.conf
----------

emphstart = <b>
emphend = </b>
title = Welcome to {$company}'s home page!
ErrorCity = You must supply a {#emphstart#}city{#emphend#}.
ErrorState = You must supply a {#emphstart#}state{#emphend#}.


index.tpl
---------

{config_load file="setup.conf"}

{eval var=$foo}
{eval var=#title#}
{eval var=#ErrorCity#}
{eval var=#ErrorState# assign="state_error"}
{$state_error}

MOSTRA:

This is the contents of foo.
Welcome to Foobar Pub & Grill's home page!
You must supply a <b>city</b>.
You must supply a <b>state</b>.
]]>
</programlisting>
</example>
</sect1>
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