gmstrftime.xml

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<!-- EN-Revision: 9b1673cf114a1e10c4563ab9223cb56aed552b89 Maintainer: mowangjuanzi Status: ready -->
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<refentry xml:id="function.gmstrftime" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>gmstrftime</refname>
  <refpurpose>根据区域设置格式化 GMT/UTC 时间/日期</refpurpose>
 </refnamediv>

 <refsynopsisdiv>
  &warn.deprecated.function-8-1-0.alternatives;
  <simplelist role="alternatives">
   <member><function>gmdate</function></member>
   <member><methodname>IntlDateFormatter::format</methodname></member>
  </simplelist>
 </refsynopsisdiv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <modifier role="attribute">#[\Deprecated]</modifier>
   <type class="union"><type>string</type><type>false</type></type><methodname>gmstrftime</methodname>
   <methodparam><type>string</type><parameter>format</parameter></methodparam>
   <methodparam choice="opt"><type class="union"><type>int</type><type>null</type></type><parameter>timestamp</parameter><initializer>&null;</initializer></methodparam>
  </methodsynopsis>
  <para>
   行为和 <function>strftime</function> 相同，只是返回的时间是格林威治标准时（GMT）。例如，在东部标准时（EST，GMT
   -0500）运行时，下面第一行显示“Dec 31 1998 20:00:00”，而第二行显示“Jan 01 1999
   01:00:00”。
  </para>
  <warning>
   <para>
    此函数依赖于操作系统区域设置信息，这些信息可能彼此不一致，或者根本不能用。而是使用
    <methodname>IntlDateFormatter::format</methodname> 方法。
   </para>
  </warning>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>format</parameter></term>
     <listitem>
      <para>
       See description in <function>strftime</function>.
      </para>
     </listitem>
    </varlistentry>
    &date.timestamp.description;
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   Returns a string formatted according to the given format string
   using the given <parameter>timestamp</parameter> or the current
   local time if no timestamp is given.  Month and weekday names and
   other language dependent strings respect the current locale set
   with <function>setlocale</function>.
   On failure, &false; is returned.
  </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>8.0.0</entry>
       <entry>
        现在 <parameter>timestamp</parameter> 允许为 null。
       </entry>
      </row>
     </tbody>
    </tgroup>
   </informaltable>
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title><function>gmstrftime</function> 例子</title>
    <programlisting role="php">
<![CDATA[
<?php
setlocale(LC_TIME, 'en_US');
echo strftime("%b %d %Y %H:%M:%S", mktime(20, 0, 0, 12, 31, 98)) . "\n";
echo gmstrftime("%b %d %Y %H:%M:%S", mktime(20, 0, 0, 12, 31, 98)) . "\n";
?>
]]>
    </programlisting>
   </example>
  </para>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><methodname>IntlDateFormatter::format</methodname></member>
    <member><methodname>DateTimeInterface::format</methodname></member>
    <member><function>strftime</function></member>
   </simplelist>
  </para>
 </refsect1>
</refentry>
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