mirror of
https://github.com/php/doc-zh.git
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264ee58391
git-svn-id: https://svn.php.net/repository/phpdoc/zh/trunk@327980 c90b9560-bf6c-de11-be94-00142212c4b1
128 lines
3.5 KiB
XML
Executable File
128 lines
3.5 KiB
XML
Executable File
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<!-- $Author$ -->
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<!-- EN-Revision: 96c9d88bad9a7d7d44bfb7f26c226df7ee9ddf26 Maintainer: dallas Status: ready -->
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<refentry xml:id="function.compact" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>compact</refname>
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<refpurpose>
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建立一个数组，包括变量名和它们的值
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</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis>
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<type>array</type><methodname>compact</methodname>
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<methodparam><type>mixed</type><parameter>varname</parameter></methodparam>
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<methodparam choice="opt"><type>mixed</type><parameter>...</parameter></methodparam>
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</methodsynopsis>
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<para>
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创建一个包含变量与其值的数组。
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</para>
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<para>
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对每个参数，<function>compact</function>
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在当前的符号表中查找该变量名并将它添加到输出的数组中，变量名成为键名而变量的内容成为该键的值。简单说，它做的事和
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<function>extract</function> 正好相反。返回将所有变量添加进去后的数组。
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</para>
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<para>
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任何没有变量名与之对应的字符串都被略过。
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</para>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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<para>
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<variablelist>
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<varlistentry>
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<term><parameter>varname</parameter></term>
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<listitem>
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<para>
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<function>compact</function> 接受可变的参数数目。每个参数可以是一个包括变量名的字符串或者是一个包含变量名的数组，该数组中还可以包含其它单元内容为变量名的数组，
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<function>compact</function> 可以递归处理。
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect1>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<para>
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返回输出的数组，包含了添加的所有变量。
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</para>
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</refsect1>
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<refsect1 role="examples">
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&reftitle.examples;
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<para>
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<example>
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<title><function>compact</function> 例子</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$city = "San Francisco";
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$state = "CA";
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$event = "SIGGRAPH";
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$location_vars = array("city", "state");
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$result = compact("event", "nothing_here", $location_vars);
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print_r($result);
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?>
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]]>
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</programlisting>
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&example.outputs;
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<screen role="php">
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<![CDATA[
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Array
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(
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[event] => SIGGRAPH
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[city] => San Francisco
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[state] => CA
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)
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]]>
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</screen>
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</example>
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</para>
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</refsect1>
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<refsect1 role="notes">
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&reftitle.notes;
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<note>
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<title>Gotcha</title>
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<para>
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因为<link linkend="language.variables.variable">可变变量</link>也许不能在函数内部用于
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PHP 的<link linkend="language.variables.superglobals">超全局数组</link>，此时不能将超全局数组传递入
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<function>compact</function> 中。
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</para>
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</note>
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</refsect1>
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<refsect1 role="seealso">
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&reftitle.seealso;
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<para>
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<simplelist>
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<member><function>extract</function></member>
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</simplelist>
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</para>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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