prev.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<!-- EN-Revision: 0a192fcd9cc43c0007de795063b4494974058992 Maintainer: yannick Status: ready -->
<!-- Reviewed: no -->
<!-- CREDITS: DavidA. -->

<refentry xml:id="function.prev" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>prev</refname>
  <refpurpose>Recule le pointeur courant de tableau</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>
   Recule le pointeur courant de tableau.
  </para>
  <para>
   <function>prev</function> se comporte exactement comme
   <function>next</function>, mais elle fait reculer le pointeur
   plutôt que de l'avancer.
  </para>
 </refsect1>
 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>array</parameter></term>
     <listitem>
      <para>
       Le tableau d'entrée.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>
 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   Retourne la valeur précédente du tableau suivant le pointeur interne
   du tableau, ou &false; s'il n'y a plus d'élément.
  </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>Exemple avec <function>prev</function></title>
    <programlisting role="php">
<![CDATA[
<?php
$transport = array('foot', 'bike', 'car', 'plane');
$mode = current($transport); // $mode = 'foot';
$mode = next($transport);    // $mode = 'bike';
$mode = next($transport);    // $mode = 'car';
$mode = prev($transport);    // $mode = 'bike';
$mode = end($transport);     // $mode = 'plane';
?>
]]>
    </programlisting>
   </example>
  </para>
 </refsect1>
 <refsect1 role="notes">
  &reftitle.notes;
  <note>
   <simpara>
    Il n'est pas possible de distinguer le début d'un tableau
     de l'élément <type>bool</type> &false;. 
    Pour faire la distinction, vérifiez si la <function>key</function> de 
    l'élément <function>prev</function> n'est pas 
    &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>
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