php-doc-en/reference/datetime/functions/gmmktime.xml

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<refentry id="function.gmmktime">
 <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></methodparam>
   <methodparam choice="opt"><type>int</type><parameter>minute</parameter></methodparam>
   <methodparam choice="opt"><type>int</type><parameter>second</parameter></methodparam>
   <methodparam choice="opt"><type>int</type><parameter>month</parameter></methodparam>
   <methodparam choice="opt"><type>int</type><parameter>day</parameter></methodparam>
   <methodparam choice="opt"><type>int</type><parameter>year</parameter></methodparam>
   <methodparam choice="opt"><type>int</type><parameter>is_dst</parameter></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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