mirror of
https://github.com/php/doc-zh.git
synced 2026-03-25 23:52:17 +01:00
264ee58391
git-svn-id: https://svn.php.net/repository/phpdoc/zh/trunk@327980 c90b9560-bf6c-de11-be94-00142212c4b1
118 lines
3.3 KiB
XML
Executable File
118 lines
3.3 KiB
XML
Executable File
<?xml version="1.0" encoding="utf-8"?>
|
|
<!-- $Revision$ -->
|
|
<!-- $Author$ -->
|
|
<!-- EN-Revision: 89a73e348c5d4bdd0300996566c672035745e2b0 Maintainer: dallas Status: ready -->
|
|
<refentry xml:id="function.current" xmlns="http://docbook.org/ns/docbook">
|
|
<refnamediv>
|
|
<refname>current</refname>
|
|
<refpurpose>返回数组中的当前单元</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsect1 role="description">
|
|
&reftitle.description;
|
|
<methodsynopsis>
|
|
<type>mixed</type><methodname>current</methodname>
|
|
<methodparam><type>array</type><parameter role="reference">array</parameter></methodparam>
|
|
</methodsynopsis>
|
|
<para>
|
|
每个数组中都有一个内部的指针指向它“当前的”单元，初始指向插入到数组中的第一个单元。
|
|
</para>
|
|
</refsect1>
|
|
|
|
<refsect1 role="parameters">
|
|
&reftitle.parameters;
|
|
<para>
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><parameter>array</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
这个数组。
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 role="returnvalues">
|
|
&reftitle.returnvalues;
|
|
<para>
|
|
<function>current</function> 函数返回当前被内部指针指向的数组单元的值，并不移动指针。如果内部指针指向超出了单元列表的末端，<function>current</function>
|
|
返回 &false;。
|
|
</para>
|
|
&return.falseproblem;
|
|
</refsect1>
|
|
<refsect1 role="examples">
|
|
&reftitle.examples;
|
|
<para>
|
|
<example>
|
|
<title>使用 <function>current</function> 系列函数的例子</title>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
$transport = array('foot', 'bike', 'car', 'plane');
|
|
$mode = current($transport); // $mode = 'foot';
|
|
$mode = next($transport); // $mode = 'bike';
|
|
$mode = current($transport); // $mode = 'bike';
|
|
$mode = prev($transport); // $mode = 'foot';
|
|
$mode = end($transport); // $mode = 'plane';
|
|
$mode = current($transport); // $mode = 'plane';
|
|
|
|
$arr = array();
|
|
var_dump(current($arr)); // bool(false)
|
|
|
|
$arr = array(array());
|
|
var_dump(current($arr)); // array(0) { }
|
|
?>
|
|
]]>
|
|
</programlisting>
|
|
</example>
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 role="notes">
|
|
&reftitle.notes;
|
|
<note>
|
|
<simpara>
|
|
如果数组包含 <type>boolean</type> &false; 的单元则本函数在碰到这个单元时也返回
|
|
&false;，使得不可能判断是否到了此数组列表的末端。
|
|
要正确遍历可能含有空单元的数组，用 <function>each</function> 函数。
|
|
</simpara>
|
|
</note>
|
|
</refsect1>
|
|
<refsect1 role="seealso">
|
|
&reftitle.seealso;
|
|
<para>
|
|
<simplelist>
|
|
<member><function>end</function></member>
|
|
<member><function>key</function></member>
|
|
<member><function>each</function></member>
|
|
<member><function>prev</function></member>
|
|
<member><function>reset</function></member>
|
|
<member><function>next</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
|
|
-->
|