mirror of
https://github.com/php/doc-zh.git
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Lu Fei
146 lines
3.7 KiB
XML
146 lines
3.7 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<!-- EN-Revision: 0ec8e36e0f649354b20c714080a903d32df4dbfb Maintainer: mowangjuanzi Status: ready -->
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<!-- CREDITS: Luffy -->
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<refentry xml:id="function.random-int" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
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<refnamediv>
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<refname>random_int</refname>
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<refpurpose>获取生成加密安全、均匀分布的整数</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>int</type><methodname>random_int</methodname>
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<methodparam><type>int</type><parameter>min</parameter></methodparam>
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<methodparam><type>int</type><parameter>max</parameter></methodparam>
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</methodsynopsis>
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<para>
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生成在指定最小值和最大值之间均匀分布的整数。
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</para>
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<para>
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该函数生成的随机性适用于所有应用，包括生成长期秘密，如加密密钥。
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</para>
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&csprng.sources;
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&csprng.function.backport;
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</refsect1><!-- }}} -->
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<refsect1 role="parameters"><!-- {{{ -->
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&reftitle.parameters;
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<variablelist>
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<varlistentry>
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<term><parameter>min</parameter></term>
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<listitem>
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<para>
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要返回的最小值。
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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>max</parameter></term>
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<listitem>
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<para>
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要返回的最大值。
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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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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从闭合区间 [<parameter>min</parameter>, <parameter>max</parameter>]
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返回加密安全、均匀分布的整数。<parameter>min</parameter> 和 <parameter>max</parameter>
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都有可能返回。
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</para>
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</refsect1><!-- }}} -->
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<refsect1 role="errors"><!-- {{{ -->
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&reftitle.errors;
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<itemizedlist>
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&csprng.errors;
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<listitem>
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<simpara>
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如果 <parameter>max</parameter> 小于 <parameter>min</parameter>，将会抛出 <classname>ValueError</classname>。
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</simpara>
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</listitem>
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</itemizedlist>
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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>8.2.0</entry>
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<entry>
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<acronym>CSPRNG</acronym> 失败时，此函数现在将抛出 <classname>Random\RandomException</classname>。之前抛出普通的
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<classname>Exception</classname>。
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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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<example xml:id="random-int.example.basic"><!-- {{{ -->
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<title><function>random_int</function> 示例</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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var_dump(random_int(100, 999));
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var_dump(random_int(-1000, 0));
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?>
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]]>
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</programlisting>
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&example.outputs.similar;
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<screen>
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<![CDATA[
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int(248)
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int(-898)
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]]>
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</screen>
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</example><!-- }}} -->
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</refsect1><!-- }}} -->
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<refsect1 role="seealso"><!-- {{{ -->
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&reftitle.seealso;
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<simplelist>
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<member><methodname>Random\Randomizer::getInt</methodname></member>
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<member><function>random_bytes</function></member>
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</simplelist>
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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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