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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.pcntl-async-signals" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<refnamediv>
<refname>pcntl_async_signals</refname>
<refpurpose>Enable/disable asynchronous signal handling or return the old setting</refpurpose>
</refnamediv>
<refsect1 role="description"><!-- {{{ -->
&reftitle.description;
<methodsynopsis>
<type>bool</type><methodname>pcntl_async_signals</methodname>
<methodparam choice="opt"><type class="union"><type>bool</type><type>null</type></type><parameter>enable</parameter><initializer>&null;</initializer></methodparam>
</methodsynopsis>
<para>
If the <parameter>enable</parameter> parameter is &null;,
<function>pcntl_async_signals</function> returns whether asynchronous signal
handling is enabled. Otherwise, asynchronous signal handling is enabled or
disabled.
</para>
</refsect1><!-- }}} -->
<refsect1 role="parameters"><!-- {{{ -->
&reftitle.parameters;
<variablelist>
<varlistentry>
<term><parameter>enable</parameter></term>
<listitem>
<para>
Whether asynchronous signal handling should be enabled.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1><!-- }}} -->
<refsect1 role="returnvalues"><!-- {{{ -->
&reftitle.returnvalues;
<para>
When used as getter (<parameter>enable</parameter> parameter is &null;) it returns
whether asynchronous signal handling is enabled. When used as setter (<parameter>enable</parameter>
parameter is not &null;), it returns whether asynchronous signal
handling was enabled <emphasis>before</emphasis> the function call.
</para>
</refsect1><!-- }}} -->
<refsect1 role="changelog">
&reftitle.changelog;
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>8.0.0</entry>
<entry>
<parameter>enable</parameter> is nullable now.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 role="seealso"><!-- {{{ -->
&reftitle.seealso;
<simplelist>
<member><link linkend="control-structures.declare">declare</link></member>
</simplelist>
</refsect1><!-- }}} -->
</refentry>
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