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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 328913 $ -->
<refentry xml:id="evperiodic.construct" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<refnamediv>
<refname>EvPeriodic::__construct</refname>
<refpurpose>Constructs EvPeriodic watcher object</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<modifier>public</modifier>
<methodname>EvPeriodic::__construct</methodname>
<methodparam>
<type>double</type>
<parameter>offset</parameter>
</methodparam>
<methodparam>
<type>string</type>
<parameter>interval</parameter>
</methodparam>
<methodparam>
<type>callable</type>
<parameter>reschedule_cb</parameter>
</methodparam>
<methodparam>
<type>callable</type>
<parameter>callback</parameter>
</methodparam>
<methodparam
choice="opt">
<type>mixed</type>
<parameter>data</parameter>
<initializer>&null;</initializer>
</methodparam>
<methodparam
choice="opt">
<type>int</type>
<parameter>priority</parameter>
<initializer>0</initializer>
</methodparam>
</methodsynopsis>
<para>
Constructs EvPeriodic watcher object and starts it automatically.
<methodname>EvPeriodic::createStopped</methodname>
method creates stopped periodic watcher.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<variablelist>
<varlistentry>
<term>
<parameter>offset</parameter>
</term>
<listitem>
<para>
See
<link linkend="ev.periodic-modes">Periodic watcher operation modes</link>
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<parameter>interval</parameter>
</term>
<listitem>
<para>
See
<link linkend="ev.periodic-modes">Periodic watcher operation modes</link>
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<parameter>reschedule_cb</parameter>
</term>
<listitem>
<para>
Reschedule callback. You can pass &null;. See
<link linkend="ev.periodic-modes">Periodic watcher operation
modes</link>
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<parameter>callback</parameter>
</term>
<listitem>
<para>
See
<link linkend="ev.watcher-callbacks">Watcher callbacks</link>
.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<parameter>data</parameter>
</term>
<listitem>
<para>
Custom data associated with the watcher.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<parameter>priority</parameter>
</term>
<listitem>
<para>
<link linkend="ev.constants.watcher-pri">Watcher priority</link>
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns EvPeriodic object on success.
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<example>
<title>Periodic timer. Use reschedule callback</title>
<programlisting role="php">
<![CDATA[
<?php
// Tick each 10.5 seconds
function reschedule_cb ($watcher, $now) {
return $now + (10.5. - fmod($now, 10.5));
}
$w = new EvPeriodic(0., 0., "reschedule_cb", function ($w, $revents) {
echo time(), PHP_EOL;
});
Ev::run();
?>
]]>
</programlisting>
</example>
<example>
<title>Periodic timer. Tick every 10.5 seconds starting at now</title>
<programlisting role="php">
<![CDATA[
<?php
// Tick every 10.5 seconds starting at now
$w = new EvPeriodic(fmod(Ev::now(), 10.5), 10.5, NULL, function ($w, $revents) {
echo time(), PHP_EOL;
});
Ev::run();
?>
]]>
</programlisting>
</example>
<example>
<title>Hourly watcher</title>
<programlisting role="php">
<![CDATA[
<?php
$hourly = EvPeriodic(0, 3600, NULL, function () {
echo "once per hour\n";
};
?>
]]>
</programlisting>
</example>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<simplelist>
<member>
<link linkend="ev.periodic-modes">Periodic watcher operation modes</link>
</member>
<member>
<classname>EvTimer</classname>
</member>
<member>
<methodname>EvPeriodic::createStopped</methodname>
</member>
</simplelist>
</refsect1>
</refentry>
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