UTCからWordPressのタイムゾーン、言語、形式の文字列への変換オプション
UTCの日付/時刻文字列を正しい言語、形式、およびタイムゾーンのきれいな日付/時刻文字列に変換するドキュメント機能を作成しました。自由にコピーしてください。
たとえば、"2019-05-30 18:06:01"(UTCで)を渡すとが返され"Maggio 30, 2019 10:06 am"ます。
/**
 * 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 );
}
参照: