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array-flip.xml
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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<!-- EN-Revision: 8a7836bf884a89125227e59be5ece70dca724567 Maintainer: daijie Status: ready -->
<!-- CREDITS: Luffy -->
<refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.array-flip">
<refnamediv>
<refname>array_flip</refname>
<refpurpose>交换数组中的键和值</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>array</type><methodname>array_flip</methodname>
<methodparam><type>array</type><parameter>array</parameter></methodparam>
</methodsynopsis>
<para>
<function>array_flip</function> 返回一个反转后的 <type>array</type>,例如
<parameter>array</parameter> 中的键名变成了值,而
<parameter>array</parameter> 中的值成了键名。
</para>
<para>
注意 <parameter>array</parameter> 中的值需要能够作为合法的键名(例如需要是
<type>int</type> 或者 <type>string</type>)。如果类型不对,将出现一个警告,并且有问题的键/值对<emphasis>将不会出现在结果里</emphasis>。
</para>
<para>
如果同一个值出现多次,则最后一个键名将作为它的值,其它键会被丢弃。
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>array</parameter></term>
<listitem>
<para>
要交换键/值对的数组。
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
返回交换后的数组。
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>array_flip</function> 例子</title>
<programlisting role="php">
<![CDATA[
<?php
$input = array("oranges", "apples", "pears");
$flipped = array_flip($input);
print_r($flipped);
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
Array
(
[oranges] => 0
[apples] => 1
[pears] => 2
)
]]>
</screen>
</example>
</para>
<para>
<example>
<title><function>array_flip</function> 例子 : 冲突</title>
<programlisting role="php">
<![CDATA[
<?php
$input = array("a" => 1, "b" => 1, "c" => 2);
$flipped = array_flip($input);
print_r($flipped);
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
Array
(
[1] => b
[2] => c
)
]]>
</screen>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>array_values</function></member>
<member><function>array_keys</function></member>
<member><function>array_reverse</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
<!-- Keep this comment at the end of the file
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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
-->