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魔王卷子
dd0fc99232
* Update constants.xml * Update ini.xml * Update sys-getloadavg.xml * Update time-sleep-until.xml * Update define.xml * Update highlight-file.xml * Update time-nanosleep.xml * Update connection-aborted.xml * Update hrtime.xml * Update connection-status.xml * Update uniqid.xml * Update halt-compiler.xml * Update sleep.xml * Update highlight-string.xml * Update ignore-user-abort.xml * Update get-browser.xml * Update usleep.xml * Update php-strip-whitespace.xml * Update constant.xml * Update get-browser.xml * Update highlight-file.xml * Update hrtime.xml * Update ignore-user-abort.xml * Update sleep.xml * Update sys-getloadavg.xml
154 lines
3.7 KiB
XML
154 lines
3.7 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<!-- EN-Revision: 0abd79a0d9d783d492a2c61b834a4ded74bc7145 Maintainer: daijie Status: ready -->
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<!-- CREDITS: mowangjuanzi -->
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<refentry xml:id="function.sleep" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>sleep</refname>
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<refpurpose>延缓执行</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>sleep</methodname>
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<methodparam><type>int</type><parameter>seconds</parameter></methodparam>
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</methodsynopsis>
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<simpara>
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程序延迟执行指定的 <parameter>seconds</parameter> 的秒数。
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</simpara>
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<note>
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<para>
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为了让程序执行延迟几分之一秒，应使用 <function>usleep</function>，因为 <function>sleep</function>
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需要 &integer;。例如 <code>sleep(0.25)</code> 会使程序暂停 <literal>0</literal> 秒。
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</para>
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</note>
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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>seconds</parameter></term>
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<listitem>
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<para>
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暂停的秒数（必须大于或等于 <literal>0</literal>）。
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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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成功时返回 0。
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</para>
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<para>
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如果函数的调用被一个信号中止，<function>sleep</function> 会返回一个非零的值。在
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Windows 上，该值总是 <literal>192</literal>（即 Windows API 常量
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<constant>WAIT_IO_COMPLETION</constant> 的值）。其他平台上，该返回值是剩余未 sleep 的秒数。
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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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<para>
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如果指定的 <parameter>seconds</parameter> 是负数，该函数会抛出 <classname>ValueError</classname>。
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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>8.0.0</entry>
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<entry>
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此函数在负数 <parameter>seconds</parameter> 时抛出 <classname>ValueError</classname>，之前会引发
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<constant>E_WARNING</constant> 且函数返回 &false;。
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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>sleep</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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// 当前时间
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echo date('h:i:s') . "\n";
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// 睡眠 10 秒
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sleep(10);
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// 醒来！
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echo date('h:i:s') . "\n";
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?>
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]]>
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</programlisting>
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<para>
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该例子会在休眠10秒后输出。
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</para>
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<screen>
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<![CDATA[
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05:31:23
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05:31:33
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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="seealso">
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&reftitle.seealso;
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<para>
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<simplelist>
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<member><function>usleep</function></member>
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<member><function>time_nanosleep</function></member>
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<member><function>time_sleep_until</function></member>
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<member><function>set_time_limit</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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