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git-svn-id: https://svn.php.net/repository/phpdoc/zh/trunk@95704 c90b9560-bf6c-de11-be94-00142212c4b1
88 lines
2.2 KiB
XML
Executable File
88 lines
2.2 KiB
XML
Executable File
<?xml version="1.0" encoding="gb2312"?>
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<!-- $Revision: 1.1 $ -->
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<!-- $Author: dallas $ -->
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<!-- EN-Revision: 1.4 Maintainer: dallas Status: ready -->
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<refentry id="function.range">
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<refnamediv>
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<refname>range</refname>
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<refpurpose>
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建立一个包含指定范围单元的数组
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</refpurpose>
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</refnamediv>
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<refsect1>
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<title>说明</title>
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<methodsynopsis>
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<type>array</type><methodname>range</methodname>
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<methodparam><type>mixed</type><parameter>low</parameter></methodparam>
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<methodparam><type>mixed</type><parameter>high</parameter></methodparam>
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</methodsynopsis>
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<para>
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<function>range</function> 返回数组中从
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<parameter>low</parameter> 到 <parameter>high</parameter> 的单元，包括它们本身。如果
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low > high，则序列将从 high 到 low。
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</para>
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<example>
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<title><function>range</function> 例子</title>
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<programlisting role="php">
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<![CDATA[
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foreach(range(0, 9) as $number) {
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echo $number;
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}
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foreach(range('a', 'z') as $letter) {
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echo $letter;
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}
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foreach(range('z', 'a') as $letter) {
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echo $letter;
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}
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]]>
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</programlisting>
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</example>
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<note>
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<para>
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在版本 4.1.0 之前 <function>range</function>
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函数只产生递增的整数数组。对于字符序列和递减数组的支持是 4.1.0 加入的。
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</para>
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<example>
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<title>模拟递减序列和字符序列</title>
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<programlisting role="php">
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<![CDATA[
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# array_reverse 可以用来调换 range 的顺序
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foreach(array_reverse(range(0,9)) as $number) {
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echo $number;
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}
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# array_map() 可以用 chr() 将整数转换成字符
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foreach(array_map('chr', range(ord('a'),ord('z'))) as $character) {
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echo $character;
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}
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]]>
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</programlisting>
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</example>
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</note>
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<para>
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另一个使用的例子参见 <function>shuffle</function>。
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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:"../../../../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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