如何使用 MEDIUM 或 FULL 日期类型使用 IntlDateFormatter 格式化日期,但没有年份?

How to format date with a IntlDateFormatter using MEDIUM or FULL datetype, but without a year?

First of all: I know that I can manually create a bunch of config files with corresponding patterns for every locale; actually I try to find a workaround with using only IntlDateFormatter.

我会试着用例子来解释。

<?php

$tz = new DateTimeZone('Europe/Moscow');
$now = time();
foreach (['en_US', 'ja_JA', 'ru_RU'] as $locale) {
    printf("%s:\n", $locale);

    foreach ([IntlDateFormatter::MEDIUM, IntlDateFormatter::LONG] as $datetype) {
        $formatter = new IntlDateFormatter($locale, $datetype, IntlDateFormatter::NONE);
        printf("- %s\n", $formatter->format($now));
    }
}

https://3v4l.org/iJOT4

这会产生

en_US:
- Feb 1, 2016
- February 1, 2016
ja_JA:
- 2016/02/01
- 2016年2月1日
ru_RU:
- 1 февр. 2016 г.
- 1 февраля 2016 г.

我需要

en_US:
- Feb 1
- February 1
ja_JA:
- 02/01
- 2月1日
ru_RU:
- 1 февр.
- 1 февраля

第一个想法是为给定的语言环境提取模式并删除任何 'y' 和 'Y' 字母。但正如您所见,年份不仅仅是一个 4 位数:所有逗号、斜杠、标签(如“г.”和“年”)。

PS:

实际上,我想要的理想 IntlDateFormatter 实现是一种智能模式,其中所有组件都各就各位,但我可以配置每个组件要使用的模式。比如:ru_RU 格式器不是 'd MMMM y г.' 模式而是 'dmy' 模式,对于 d 组件它有 d 模式,m - MMMMy - y г.。所以我可以说 y 组件是一个 '' (空字符串),瞧。

此外,如果您知道任何图书馆已经这样做了——请告诉我。

所以,目前这是不可能的。我发现 intl PHP 扩展只是缺少 DateTimePatternGenerator (http://userguide.icu-project.org/formatparse/datetime),这正是我所需要的。

The DateTimePatternGenerator class provides a way to map a request for a set of date/time fields, along with their width, to a locale-appropriate format pattern. The request is in the form of a “skeleton” which just contains pattern letters for the desired fields using the representation for the desired width. In a skeleton, anything other than a pattern letter is ignored, field order is insignificant, and there are two special additional pattern letters that may be used: 'j' requests the preferred hour-cycle type for the locale (it gets mapped to one of 'H', 'h', 'k', or 'K'); 'J' is similar but requests no AM/PM marker even if the locale’s preferred hour-cycle type is 'h' or 'K'.

For example, a skeleton of “MMMMdjmm” might result in the following format patterns for different locales:

locale | format pattern for skeleton “MMMMdjmm” | example
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
en_US    "MMMM d  'at'  h:mm a"                   April 2 at 5:00 PM
es_ES    "d 'de' MMMM, H:mm"                      2 de abril, 17:00
ja_JP    "M月d日 H:mm"                              4月2日 17:00

此外,我发现 HHVM 已经实现了它 — https://github.com/facebook/hhvm/commit/bc84daf7816e4cd268da59d535dcadfc6cf01085。我希望有一天这会被移植到 PHP.

UPD: 我已经写了很多关于这个问题的 post — https://blog.ksimka.com/a-long-journey-to-formatting-a-date-without-a-year-internationally-with-php/