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Dai Jie
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git-svn-id: https://svn.php.net/repository/phpdoc/zh/trunk@327980 c90b9560-bf6c-de11-be94-00142212c4b1
225 lines
6.0 KiB
XML
Executable File
225 lines
6.0 KiB
XML
Executable File
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<!-- EN-Revision: d6b4563c0825092ca3e13700d76a34f527e8ba53 Maintainer: HonestQiao Status: ready -->
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<!-- Reviewed: no Maintainer: HonestQiao -->
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<refentry xml:id="function.sort" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
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<refnamediv>
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<refname>sort</refname>
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<refpurpose>对数组排序</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>bool</type><methodname>sort</methodname>
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<methodparam><type>array</type><parameter role="reference">array</parameter></methodparam>
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<methodparam choice="opt"><type>int</type><parameter>sort_flags</parameter><initializer>SORT_REGULAR</initializer></methodparam>
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</methodsynopsis>
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<para>
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本函数对数组进行排序。当本函数结束时数组单元将被从最低到最高重新安排。
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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>array</parameter></term>
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<listitem>
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<para>
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要排序的数组。
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>sort_flags</parameter></term>
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<listitem>
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<para>
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可选的第二个参数 <parameter>sort_flags</parameter>
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可以用以下值改变排序的行为：
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</para>
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<para>
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排序类型标记：
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<itemizedlist>
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<listitem>
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<simpara><constant>SORT_REGULAR</constant> - 正常比较单元（不改变类型）</simpara>
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</listitem>
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<listitem>
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<simpara><constant>SORT_NUMERIC</constant> - 单元被作为数字来比较</simpara>
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</listitem>
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<listitem>
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<simpara><constant>SORT_STRING</constant> - 单元被作为字符串来比较</simpara>
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</listitem>
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<listitem>
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<simpara> <constant>SORT_LOCALE_STRING</constant> -
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根据当前的区域（locale）设置来把单元当作字符串比较，可以用
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<function>setlocale</function> 来改变。
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<!-- FIXME PHP_6
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在
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PHP 6 之前，使用了系统的区域设置，可以用
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<function>setlocale</function> 来改变。自 PHP 6 起，必须用
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<function>i18n_loc_set_default</function> 函数。
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-->
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</simpara>
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</listitem>
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<listitem>
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<simpara><constant>SORT_NATURAL</constant> - 和 <function>natsort</function> 类似对每个单元以“自然的顺序”对字符串进行排序。 PHP 5.4.0 中新增的。</simpara>
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</listitem>
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<listitem>
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<simpara><constant>SORT_FLAG_CASE</constant> - 能够与 <constant>SORT_STRING</constant> 或
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<constant>SORT_NATURAL</constant> 合并（OR 位运算），不区分大小写排序字符串。</simpara>
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</listitem>
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</itemizedlist>
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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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&return.success;
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</para>
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</refsect1>
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<refsect1 role="changelog">
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&reftitle.changelog;
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<informaltable>
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<tgroup cols="2">
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<thead>
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<row>
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<entry>&Version;</entry>
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<entry>&Description;</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry>5.4.0</entry>
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<entry>
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添加了 <parameter>sort_flags</parameter> 内 <constant>SORT_NATURAL</constant> 和
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<constant>SORT_FLAG_CASE</constant> 的支持。
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</entry>
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</row>
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<row>
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<entry>5.0.2</entry>
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<entry>
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添加了 <constant>SORT_LOCALE_STRING</constant>。
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</entry>
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</row>
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</tbody>
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</tgroup>
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</informaltable>
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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>sort</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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$fruits = array("lemon", "orange", "banana", "apple");
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sort($fruits);
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foreach ($fruits as $key => $val) {
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echo "fruits[" . $key . "] = " . $val . "\n";
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}
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?>
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]]>
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</programlisting>
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&example.outputs;
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<screen>
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<![CDATA[
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fruits[0] = apple
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fruits[1] = banana
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fruits[2] = lemon
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fruits[3] = orange
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]]>
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</screen>
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</example>
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</para>
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<para>
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fruits 被按照字母顺序排序。
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</para>
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<para>
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<example>
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<title>使用不区分大小写自然排序的 <function>sort</function> 例子</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$fruits = array(
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"Orange1", "orange2", "Orange3", "orange20"
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);
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sort($fruits, SORT_NATURAL | SORT_FLAG_CASE);
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foreach ($fruits as $key => $val) {
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echo "fruits[" . $key . "] = " . $val . "\n";
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}
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?>
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]]>
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</programlisting>
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&example.outputs;
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<screen>
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<![CDATA[
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fruits[0] = Orange1
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fruits[1] = orange2
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fruits[2] = Orange3
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fruits[3] = orange20
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]]>
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</screen>
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</example>
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</para>
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<para>
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fruits 排序得像 <function>natcasesort</function> 的结果。
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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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¬e.no-key-association;
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<note>
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<simpara>
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和大多数 PHP 排序函数一样，<function>sort</function>
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使用了 <link
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xlink:href="&url.wiki.quicksort;">Quicksort</link> 实现的。
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</simpara>
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</note>
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<warning>
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<simpara>
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在对含有混合类型值的数组排序时要小心，因为
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<function>sort</function> 可能会产生不可预知的结果。
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</simpara>
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</warning>
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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>asort</function></member>
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<member>&seealso.array.sorting;</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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