<?xml version="1.0" encoding="utf-8"?>
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<refentry xml:id="function.variant-date-to-timestamp" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>variant_date_to_timestamp</refname>
  <refpurpose>Converts a variant date/time value to Unix timestamp</refpurpose>
 </refnamediv>
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type class="union"><type>int</type><type>null</type></type><methodname>variant_date_to_timestamp</methodname>
   <methodparam><type>variant</type><parameter>variant</parameter></methodparam>
  </methodsynopsis>
  <para>
   Converts <parameter>variant</parameter> from a <constant>VT_DATE</constant>
   (or similar) value into a Unix timestamp.  This allows easier
   interopability between the Unix-ish parts of PHP and COM.
  </para>
 </refsect1>
 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>variant</parameter></term>
     <listitem>
      <para>
       The variant.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>
 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   Returns a unix timestamp, or &null; on failure.
  </para>
 </refsect1>
 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>variant_date_from_timestamp</function></member>
    <member><function>date</function></member>
    <member><function>strftime</function></member>
   </simplelist>
  </para>
 </refsect1>
</refentry>
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