从codex:

应使用current\\u time（\'timestamp\'）代替time（）返回博客的本地时间。在WordPress中，PHP的time（）将始终返回UTC，与调用current\\u time（“timestamp”，true）相同。

尝试以下操作：

define( \'MY_TIMEZONE\', (get_option( \'timezone_string\' ) ? get_option( \'timezone_string\' ) : date_default_timezone_get() ) );
date_default_timezone_set( MY_TIMEZONE );
echo date_i18n(\'F d, Y H:i\', 1365194723);

date_i18n($format, $timestamp) 根据区域设置而不是时区设置格式。get_date_from_gmt($datestring, $format) 根据时区（而不是区域设置）设置格式。要根据时区和区域设置获取格式，我将执行以下操作：

function local_date_i18n($format, $timestamp) {
    $timezone_str = get_option(\'timezone_string\') ?: \'UTC\';
    $timezone = new \\DateTimeZone($timezone_str);

    // The date in the local timezone.
    $date = new \\DateTime(null, $timezone);
    $date->setTimestamp($timestamp);
    $date_str = $date->format(\'Y-m-d H:i:s\');

    // Pretend the local date is UTC to get the timestamp
    // to pass to date_i18n().
    $utc_timezone = new \\DateTimeZone(\'UTC\');
    $utc_date = new \\DateTime($date_str, $utc_timezone);
    $timestamp = $utc_date->getTimestamp();

    return date_i18n($format, $timestamp, true);
}

$format = \'F d, Y H:i\';
$timestamp = 1365186960;
$local = local_date_i18n($format, $timestamp);
$gmt = date_i18n($format, $timestamp);
echo "Local: ", $local, " UTC: ", $gmt;

当地时间：2013年4月5日11:36 UTC时间：2013年4月5日18:36

参考文献：

• DateTimeZone docs 在php中。净值DateTime docs 在php中。净额，包括setTimestamp, getTimestamp 和format
• WordPress\'date_i18n docs

将UTC转换为WordPress选项中时区、语言和格式的字符串我创建了一个well document函数，它可以将UTC中的日期时间字符串转换为正确语言、格式和时区的漂亮日期时间字符串。请随意复制。

For example, passing in "2019-05-30 18:06:01" (in UTC) would return "Maggio 30, 2019 10:06 am".

/**
 * Given a string with the date and time in UTC, returns a pretty string in the
 * configured language, format and timezone in WordPress\' options.
 *
 * @param string $utc_date_and_time 
 *      e.g: "2019-05-30 18:06:01"
 *      This argument must be in UTC.
 * @return string 
 *      e.g: "Maggio 30, 2019 10:06 am"
 *      This returns a pretty datetime string in the correct language and
 *      following the admin\'s settings.
 */
function pretty_utc_date( string $utc_date ): string {
    if (! preg_match( \'/^\\d\\d\\d\\d-\\d\\d-\\d\\d \\d\\d:\\d\\d:\\d\\d$/\', $utc_date ) ) {
        /* I have not tested other formats, so only this one allowed. */
        throw new InvalidArgumentException( "Expected argument to be in YYYY-MM-DD hh:mm:ss format" );
    }

    $date_in_local_timezone = get_date_from_gmt( $utc_date );

    /* $date_in_local_timezone is now something like "2019-05-30 10:06:01"
     * in the timezone of get_option( \'timezone_string\' ), configured in
     * WordPress\' general settings in the backend user interface.
     */

    /* Unfortunately, we can\'t just pass this to WordPress\' date_i18n, as that
     * expects the second argument to be the number of seconds since 1/Jan/1970
     * 00:00:00 in the timezone of get_option( \'timezone_string\' ), which is not the
     * same as a UNIX epoch timestamp, which is the number of seconds since
     * 1/Jan/1970 00:00:00 GMT. */
    $seconds_since_local_1_jan_1970 =
        (new DateTime( $date_in_local_timezone, new DateTimeZone( \'UTC\' ) ))
        ->getTimestamp();
    // e.g: 1559210761

    /* Administrators can set a preferred date format and a preferred time
     * format in WordPress\' general settings in the backend user interface, we
     * need to retrieve that. */
    $settings_format = get_option( \'date_format\' ) . \' \'. get_option( \'time_format\' );
    // $settings_format is in this example "F j, Y g:i a"

    /* In this example, the installation of WordPress has been set to Italian,
     * and the final result is "Maggio 30, 2019 10:06 am" */
    return date_i18n( $settings_format, $seconds_since_local_1_jan_1970 );

}

参考文献：get_date_from_gmt docs

DateTimeZone docs 在php中。净值DateTime docs 在php中。净额，包括getTimestamp

WordPress\'date_i18n docsdate_default_timezone_set( \'UTC\' ); 无论管理员在用户界面中选择什么时区，因此在确定内置PHP函数的行为时都要记住这一点。看见date_default_timezone_set docs 在php中。净额

将时区偏移量添加到时间戳中。

$offset = get_option( \'gmt_offset\' ) * HOUR_IN_SECONDS;
return date_i18n( get_option( \'date_format\' ), $ts + $offset );

$tz = new DateTimeZone( get_option( \'timezone_string\' ) );
$offset_for_that_time = timezone_offset_get ( $tz , new DateTime("@{$ts}") );
return date_i18n ( get_option( \'date_format\' ), $ts + offset_for_that_time );

这就是我的机器上似乎起作用的东西（其他东西都不起作用）：

$tz = new DateTimeZone(get_option(\'timezone_string\'));
$dtz = new DateTimeZone(\'GMT\');
foreach($posts as $key => $post){
    $gmt_date = DateTime::createFromFormat(\'Y-m-d H:i:s\', $post->PostDateGMT, $dtz);
    $gmt_date->setTimeZone($tz);
    $posts[$key]->PostDateGMT = $gmt_date->format(\'Y-m-d H:i:s\');
}

它没有使用date_l18n() 但我想人们以后可以用它。。。