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<refentry xml:id="datetimeimmutable.construct" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
 <refnamediv>
  <refname>DateTimeImmutable::__construct</refname>
  <refname>date_create_immutable</refname>
  <refpurpose>Returns new DateTimeImmutable object</refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <para>&style.oop;</para>
  <constructorsynopsis role="DateTimeImmutable">
   <modifier>public</modifier> <methodname>DateTimeImmutable::__construct</methodname>
   <methodparam choice="opt"><type>string</type><parameter>datetime</parameter><initializer>"now"</initializer></methodparam>
   <methodparam choice="opt"><type class="union"><type>DateTimeZone</type><type>null</type></type><parameter>timezone</parameter><initializer>&null;</initializer></methodparam>
  </constructorsynopsis>
  <para>&style.procedural;</para>
  <methodsynopsis>
   <type class="union"><type>DateTimeImmutable</type><type>false</type></type><methodname>date_create_immutable</methodname>
   <methodparam choice="opt"><type>string</type><parameter>datetime</parameter><initializer>"now"</initializer></methodparam>
   <methodparam choice="opt"><type class="union"><type>DateTimeZone</type><type>null</type></type><parameter>timezone</parameter><initializer>&null;</initializer></methodparam>
  </methodsynopsis>
  <para>
   Returns new a DateTimeImmutable object.
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <variablelist>
   <varlistentry>
    <term><parameter>datetime</parameter></term>
    <listitem>
     <para>&date.formats.parameter;</para>
     <para>
      Enter <literal>"now"</literal> here to obtain the current time when using
      the <parameter>$timezone</parameter> parameter.
     </para>
    </listitem>
   </varlistentry>
   <varlistentry>
    <term><parameter>timezone</parameter></term>
    <listitem>
     <para>
      A <classname>DateTimeZone</classname> object representing the
      timezone of <parameter>$datetime</parameter>.
     </para>
     <para>
      If <parameter>$timezone</parameter> is omitted or &null;,
      the current timezone will be used.
     </para>
     <note>
      <para>
       The <parameter>$timezone</parameter> parameter
       and the current timezone are ignored when the
       <parameter>$datetime</parameter> parameter either
       is a UNIX timestamp (e.g. <literal>@946684800</literal>)
       or specifies a timezone
       (e.g. <literal>2010-01-28T15:00:00+02:00</literal>, or
       <literal>2010-07-05T06:00:00Z</literal>).
      </para>
     </note>
    </listitem>
   </varlistentry>
  </variablelist>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   Returns a new DateTimeImmutable instance.
  </para>
 </refsect1>

 <refsect1 role="errors">
  &reftitle.errors;
  <para>
    If an invalid Date/Time string is passed,
    <exceptionname>DateMalformedStringException</exceptionname> is thrown.
    Previous to PHP 8.3, this was <exceptionname>Exception</exceptionname>.
  </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>8.3.0</entry>
       <entry>
        Now throws
        <exceptionname>DateMalformedStringException</exceptionname> if an
        invalid string is passed, instead of
        <exceptionname>Exception</exceptionname>.
       </entry>
      </row>
      <row>
       <entry>7.1.0</entry>
       <entry>From now on microseconds are filled with actual value. Not with '00000'.</entry>
      </row>
     </tbody>
    </tgroup>
   </informaltable>
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <example>
   <title><function>DateTimeImmutable::__construct</function> example</title>
   <para>&style.oop;</para>
   <programlisting role="php">
<![CDATA[
<?php
try {
    $date = new DateTimeImmutable('2000-01-01');
} catch (Exception $e) {
    echo $e->getMessage();
    exit(1);
}

echo $date->format('Y-m-d');
?>
]]>
   </programlisting>
   <para>&style.procedural;</para>
   <programlisting role="php">
<![CDATA[
<?php
$date = date_create('2000-01-01');
if (!$date) {
    $e = date_get_last_errors();
    foreach ($e['errors'] as $error) {
        echo "$error\n";
    }
    exit(1);
}

echo date_format($date, 'Y-m-d');
?>
]]>
   </programlisting>
   &examples.outputs;
   <screen>
<![CDATA[
2000-01-01
]]>
   </screen>
  </example>
  <example>
   <title>Intricacies of <function>DateTimeImmutable::__construct</function></title>
   <programlisting role="php">
<![CDATA[
<?php
// Specified date/time in your computer's time zone.
$date = new DateTimeImmutable('2000-01-01');
echo $date->format('Y-m-d H:i:sP') . "\n";

// Specified date/time in the specified time zone.
$date = new DateTimeImmutable('2000-01-01', new DateTimeZone('Pacific/Nauru'));
echo $date->format('Y-m-d H:i:sP') . "\n";

// Current date/time in your computer's time zone.
$date = new DateTimeImmutable();
echo $date->format('Y-m-d H:i:sP') . "\n";

// Current date/time in the specified time zone.
$date = new DateTimeImmutable('now', new DateTimeZone('Pacific/Nauru'));
echo $date->format('Y-m-d H:i:sP') . "\n";

// Using a UNIX timestamp.  Notice the result is in the UTC time zone.
$date = new DateTimeImmutable('@946684800');
echo $date->format('Y-m-d H:i:sP') . "\n";

// Non-existent values roll over.
$date = new DateTimeImmutable('2000-02-30');
echo $date->format('Y-m-d H:i:sP') . "\n";
?>
]]>
   </programlisting>
   &example.outputs.similar;
   <screen>
<![CDATA[
2000-01-01 00:00:00-05:00
2000-01-01 00:00:00+12:00
2010-04-24 10:24:16-04:00
2010-04-25 02:24:16+12:00
2000-01-01 00:00:00+00:00
2000-03-01 00:00:00-05:00
]]>
   </screen>
  </example>

  <example>
   <title>Changing the associated timezone</title>
   <programlisting role="php">
<![CDATA[
<?php
$timeZone = new \DateTimeZone('Asia/Tokyo');

$time = new \DateTimeImmutable();
$time = $time->setTimezone($timeZone);

echo $time->format('Y/m/d H:i:s'), "\n";
?>
]]>
   </programlisting>
   &example.outputs.similar;
   <screen>
<![CDATA[
2022/08/12 23:49:23
]]>
   </screen>
  </example>

  <example>
   <title>Using a relative date/time string</title>
   <programlisting role="php">
<![CDATA[
<?php
$time = new \DateTimeImmutable("-1 year");

echo $time->format('Y/m/d H:i:s'), "\n";
?>
]]>
   </programlisting>
   &example.outputs.similar;
   <screen>
<![CDATA[
2021/08/12 15:43:51
]]>
   </screen>
  </example>
 </refsect1>


</refentry>
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