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examples.xml
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examples.xml
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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<!-- EN-Revision: aebf045bfb7f4f2350db5e1e908cf290be334075 Maintainer: mowangjuanzi Status: ready -->
<chapter xml:id="pcntl.examples" xmlns="http://docbook.org/ns/docbook">
&reftitle.examples;
<section xml:id="pcntl.example">
<title>基本用法</title>
<para>
这个示例用于产生一个守护进程并可以通过信号处理进行关闭。
</para>
<example>
<title>进程控制示例</title>
<programlisting role="php">
<![CDATA[
<?php
declare(ticks=1);
$pid = pcntl_fork();
if ($pid == -1) {
die("could not fork");
} else if ($pid) {
exit(); // 父进程
} else {
// 子进程
}
// 从控制终端分离
if (posix_setsid() == -1) {
die("could not detach from terminal");
}
// 安装信号处理程序
pcntl_signal(SIGTERM, "sig_handler");
pcntl_signal(SIGHUP, "sig_handler");
// 执行无限循环任务
while (1) {
// do something interesting here
}
function sig_handler($signo)
{
switch ($signo) {
case SIGTERM:
// 处理终止任务
exit;
break;
case SIGHUP:
// 处理重启任务
break;
default:
// 处理所有其它信号
}
}
?>
]]>
</programlisting>
</example>
</section>
</chapter>
<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-omittag:t
sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
indent-tabs-mode:nil
sgml-parent-document:nil
sgml-default-dtd-file:"~/.phpdoc/manual.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:nil
sgml-local-ecat-files:nil
End:
vim600: syn=xml fen fdm=syntax fdl=2 si
vim: et tw=78 syn=sgml
vi: ts=1 sw=1
-->