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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 297028 $ -->
<refentry xml:id="function.gmmktime" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>gmmktime</refname>
<refpurpose>Get Unix timestamp for a GMT date</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>int</type><methodname>gmmktime</methodname>
<methodparam choice="opt"><type>int</type><parameter>hour</parameter><initializer>gmdate("H")</initializer></methodparam>
<methodparam choice="opt"><type>int</type><parameter>minute</parameter><initializer>gmdate("i")</initializer></methodparam>
<methodparam choice="opt"><type>int</type><parameter>second</parameter><initializer>gmdate("s")</initializer></methodparam>
<methodparam choice="opt"><type>int</type><parameter>month</parameter><initializer>gmdate("n")</initializer></methodparam>
<methodparam choice="opt"><type>int</type><parameter>day</parameter><initializer>gmdate("j")</initializer></methodparam>
<methodparam choice="opt"><type>int</type><parameter>year</parameter><initializer>gmdate("Y")</initializer></methodparam>
<methodparam choice="opt"><type>int</type><parameter>is_dst</parameter><initializer>-1</initializer></methodparam>
</methodsynopsis>
<para>
Identical to <function>mktime</function> except the passed parameters represents a
GMT date. <function>gmmktime</function> internally uses <function>mktime</function>
so only times valid in derived local time can be used.
</para>
<para>
Like <function>mktime</function>, arguments may be left out in order
from right to left, with any omitted arguments being set to the
current corresponding GMT value.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>hour</parameter></term>
<listitem>
<para>
The hour
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>minute</parameter></term>
<listitem>
<para>
The minute
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>second</parameter></term>
<listitem>
<para>
The second
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>month</parameter></term>
<listitem>
<para>
The month
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>day</parameter></term>
<listitem>
<para>
The day
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>year</parameter></term>
<listitem>
<para>
The year
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>is_dst</parameter></term>
<listitem>
<para>
Parameters always represent a GMT date so <parameter>is_dst</parameter>
doesn't influence the result.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns a <type>integer</type> Unix timestamp.
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<para>
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>5.1.0</entry>
<entry>
As of PHP 5.1.0, the <parameter>is_dst</parameter> parameter became
deprecated. As a result, the new timezone handling features should be used
instead.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>gmmktime</function> on Windows boundary</title>
<programlisting role="php">
<![CDATA[
<?php
gmmktime(0, 0, 0, 1, 1, 1970); // valid in GMT and west, invalid in east
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>mktime</function></member>
<member><function>date</function></member>
<member><function>time</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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