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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 297028 $ -->
<refentry xml:id='function.pcntl-alarm' xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>pcntl_alarm</refname>
<refpurpose>Set an alarm clock for delivery of a signal</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>int</type><methodname>pcntl_alarm</methodname>
<methodparam><type>int</type><parameter>seconds</parameter></methodparam>
</methodsynopsis>
<para>
Creates a timer that will send a <constant>SIGALRM</constant> signal to
the process after the given number of seconds.
Any call to <function>pcntl_alarm</function> will cancel any previously
set alarm.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>seconds</parameter></term>
<listitem>
<para>
The number of seconds to wait. If <parameter>seconds</parameter> is
zero, no new alarm is created.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns the time in seconds that any previously scheduled alarm had
remaining before it was to be delivered, or <literal>0</literal> if there
was no previously scheduled alarm.
</para>
</refsect1>
</refentry>
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