php-doc-en/reference/mongodb/bson/utcdatetime/construct.xml

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<refentry xml:id="mongodb-bson-utcdatetime.construct" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
 <refnamediv>
  <refname>MongoDB\BSON\UTCDateTime::__construct</refname>
  <refpurpose>Construct a new UTCDateTime</refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <modifier>final</modifier> <modifier>public</modifier> <methodname>MongoDB\BSON\UTCDateTime::__construct</methodname>
   <methodparam choice="opt"><type>integer|float|string|DateTimeInterface</type><parameter>milliseconds</parameter><initializer>&null;</initializer></methodparam>
  </methodsynopsis>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <variablelist>
   <varlistentry>
    <term><parameter>milliseconds</parameter> (<type>integer|float|string|DateTimeInterface</type>)</term>
    <listitem>
     <para>
      Number of milliseconds since the Unix epoch (Jan 1, 1970). Negative values
      represent dates before 1970. This value may be provided as a 64-bit
      <type>integer</type>. For compatibility on 32-bit systems, this parameter
      may also be provided as a <type>float</type> or <type>string</type>.
     </para>
     <para>
      If the argument is a <classname>DateTimeInterface</classname>, the number
      of milliseconds since the Unix epoch will be derived from that value.
      Note that in versions of PHP versions before 7.1.0,
      <classname>DateTime</classname> and
      <classname>DateTimeImmutable</classname> objects constructed from the
      current time
      <link linkend="migration71.incompatible.datetime-microseconds">did not
        incorporate sub-second precision</link>.
     </para>
     <para>
      If this argument is &null;, the current time will be used by default.
     </para>
    </listitem>
   </varlistentry>
  </variablelist>
 </refsect1>

 <refsect1 role="errors">
  &reftitle.errors;
  <simplelist>
   &mongodb.throws.argumentparsing;
  </simplelist>
 </refsect1>

 <refsect1 role="changelog">
  &reftitle.changelog;
  <para>
   <informaltable>
    <tgroup cols="2">
     <thead>
      <row>
       <entry>&Version;</entry>
       <entry>&Description;</entry>
      </row>
     </thead>
     <tbody>
      <row>
       <entry>1.2.0</entry>
       <entry>
        <para>
         The <parameter>milliseconds</parameter> argument is optional and
         defaults to &null; (i.e. current time). The argument also accepts a
         <classname>DateTimeInterface</classname>, which may be used to derive
         the number of milliseconds since the Unix epoch. Previously, only
         <type>integer</type>, <type>float</type>, and <type>string</type> types
         were accepted.
        </para>
       </entry>
      </row>
     </tbody>
    </tgroup>
   </informaltable>
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <example>
   <title><function>MongoDB\BSON\UTCDateTime::__construct</function> example</title>
   <programlisting role="php">
<![CDATA[
<?php

var_dump(new MongoDB\BSON\UTCDateTime);

var_dump(new MongoDB\BSON\UTCDateTime(new DateTime));

var_dump(new MongoDB\BSON\UTCDateTime(1416445411987));

?>
]]>
   </programlisting>
   &example.outputs.similar;
   <screen>
<![CDATA[
object(MongoDB\BSON\UTCDateTime)#1 (1) {
  ["milliseconds"]=>
  string(13) "1484852905560"
}
object(MongoDB\BSON\UTCDateTime)#1 (1) {
  ["milliseconds"]=>
  string(13) "1484852905560"
}
object(MongoDB\BSON\UTCDateTime)#1 (1) {
  ["milliseconds"]=>
  string(13) "1416445411987"
}
]]>
   </screen>
  </example>
 </refsect1>


 <refsect1 role="seealso">
  &reftitle.seealso;
  <simplelist>
   <member><link xlink:href="&url.mongodb.docs.bson;#date">BSON Types: Date</link></member>
  </simplelist>
 </refsect1>

</refentry>

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