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prev.xml
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131 lines (128 loc) · 3.42 KB
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<?xml version="1.0" encoding="utf-8"?>
<!-- EN-Revision: 2e60c5134e7a847c99f81eb3f7ecee1f5efeeace Maintainer: PhilDaiguille Status: ready -->
<!-- Reviewed: no -->
<!-- CREDITS: DavidA. -->
<refentry xml:id="function.prev" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>prev</refname>
<refpurpose>Retrocede el puntero actual del array</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>mixed</type><methodname>prev</methodname>
<methodparam><type class="union"><type>array</type><type>object</type></type><parameter role="reference">array</parameter></methodparam>
</methodsynopsis>
<para>
Retrocede el puntero actual del array.
</para>
<para>
<function>prev</function> se comporta exactamente como
<function>next</function>, pero retrocede el puntero
en lugar de avanzarlo.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>array</parameter></term>
<listitem>
<para>
El array de entrada.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Devuelve el valor anterior del array según el puntero interno
del array, o &false; si no hay más elementos.
</para>
&return.falseproblem;
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
&standard.changelog.calling-on-objects;
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title>Ejemplo con <function>prev</function></title>
<programlisting role="php">
<![CDATA[
<?php
$transport = array('foot', 'bike', 'car', 'plane');
echo $mode = current($transport), PHP_EOL; // $mode = 'foot';
echo $mode = next($transport), PHP_EOL; // $mode = 'bike';
echo $mode = next($transport), PHP_EOL; // $mode = 'car';
echo $mode = prev($transport), PHP_EOL; // $mode = 'bike';
echo $mode = end($transport), PHP_EOL; // $mode = 'plane';
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="notes">
&reftitle.notes;
<note>
<simpara>
No es posible distinguir el inicio de un array
del elemento <type>bool</type> &false;.
Para hacer la distinción, verifique si la <function>key</function> del
elemento <function>prev</function> no es
&null;.
</simpara>
</note>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>current</function></member>
<member><function>end</function></member>
<member><function>next</function></member>
<member><function>reset</function></member>
<member><function>each</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-omittag:t
sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
indent-tabs-mode:nil
sgml-parent-document:nil
sgml-default-dtd-file:"~/.phpdoc/manual.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:nil
sgml-local-ecat-files:nil
End:
vim600: syn=xml fen fdm=syntax fdl=2 si
vim: et tw=78 syn=sgml
vi: ts=1 sw=1
-->