在Twig模板中使用4位数年份的本地化日期

Posted 2021-04-14

我在Symfony 2.4项目中使用Twig Intl Extension来本地化日期：

{{ post.published_at|localizeddate('short', 'none', locale) }}

这很好用，但不会以yyyy格式显示整年，而是使用yy格式。

这样，2013年12月31日将显示为2013年12月31日或12/31/2013，具体取决于区域设置，而不是2013年12月31日或2013年12月31日。

有没有办法使用4位数年份的本地化日期？

答案

我终于成功了！

我以这种方式扩展了默认的Twig Intl扩展：

<?php
namespace AcmeDemoBundleTwig;

class AcmeIntlExtension extends Twig_Extensions_Extension_Intl
{
    public function getFilters()
    {
        return array(
            new Twig_SimpleFilter('localizeddate', array($this, 'twigLocalizedDateFilter'), array('needs_environment' => true)),
        );
    }

    public function twigLocalizedDateFilter($env, $date, $dateFormat = 'medium', $timeFormat = 'medium', $locale = null, $timezone = null, $format = null)
    {
        $date = twig_date_converter($env, $date, $timezone);

        $formatValues = array(
            'none'   => IntlDateFormatter::NONE,
            'short'  => IntlDateFormatter::SHORT,
            'medium' => IntlDateFormatter::MEDIUM,
            'long'   => IntlDateFormatter::LONG,
            'full'   => IntlDateFormatter::FULL,
        );

        $formatter = IntlDateFormatter::create(
            $locale,
            $formatValues[$dateFormat],
            $formatValues[$timeFormat],
            $date->getTimezone()->getName(),
            IntlDateFormatter::GREGORIAN,
            $format
        );

        if ($format === null) {
            // Replace yy to y (but yyy should be kept yyy, and yyyy kept as yyyy)
            // This way, years are NEVER shown as "yy" (eg. 14), but always like "yyyy" (eg. 2014)
            $pattern = preg_replace(':(^|[^y])y{2,2}([^y]|$):', '$1y$2', $formatter->getPattern());

            $formatter->setPattern($pattern);
        }

        return $formatter->format($date->getTimestamp());
    }
}

它在我的Symfony的app/config.yml文件中声明：

services:
    acme.twig.extension.intl:
        class: AcmeDemoBundleTwigAcmeIntlExtension
        tags:
            - { name: twig.extension }

我更改了默认模式，将“yy”替换为“y”（这是4位数年份的格式，如下所述：http://userguide.icu-project.org/formatparse/datetime）。

这样，它适用于所有格式和所有语言环境。

另一答案

扩展intl扩展的解决方案很好，但您可以更轻松地完成。如果您仔细查看文档，您会看到扩展名有format参数。所以你可以这样做：

{{ post.published_at|localizeddate('short', 'none', locale, null, 'd/m/y HH:mm') }}

格式遵循ICU格式指南。对于4位数年份，您可以使用yor yyyy。完整文档：http://userguide.icu-project.org/formatparse/datetime

希望能帮助到你。

另一答案

改变MichaëlPerrin的答案，通过将_year添加到日期格式，能够使用新旧方式。

使用以下命令创建文件app / src / Myproject / MyBundle / Twig / Extension / IntlExtension.php：

<?php
namespace MyprojectMyBundleTwigExtension;

/**
 * Extension of Twig Intl Extension to add support fo showing 4-digit year. Add
 * '_year' to the date format for it to work, i.e. short_year instead of short.
 */
class IntlExtension extends Twig_Extensions_Extension_Intl
{

    /**
     * A new filter must be added for this extension to work. Since this extension
     * extends an existing one, the filter should be loaded after the original one.
     *
     * @return array
     */
    public function getFilters()
    {
        $filters = [];

        // Add all filters but the localizeddate created by the parent.
        foreach (parent::getFilters() as $filter) {
            if ('localizeddate' !== $filter->getName()) {
                $filters[] = $filter;
            }
        }

        // Add custom version of 'localizeddate' which adds support showing 4-digit years.
        $filters[] = new Twig_SimpleFilter('localizeddate', array($this, 'twigLocalizedDateFilter'), array('needs_environment' => true));

        return $filters;
    }

    /**
     * If the date format has _year in it, the format returned by Intl, will be
     * changed to show a 4-digit year.
     *
     * @param Twig_Environment $env
     * @param DateTime $date
     * @param string $dateFormat
     * @param string $timeFormat
     * @param string $locale
     * @param string $timezone
     * @param string $format
     * @return string
     */
    public function twigLocalizedDateFilter(Twig_Environment $env, $date, $dateFormat = 'medium', $timeFormat = 'medium', $locale = null, $timezone = null, $format = null, $calendar = 'gregorian')
    {
        $date = twig_date_converter($env, $date, $timezone);

        $formatValues = array(
            'none' => IntlDateFormatter::NONE,
            'short' => IntlDateFormatter::SHORT,
            'medium' => IntlDateFormatter::MEDIUM,
            'long' => IntlDateFormatter::LONG,
            'full' => IntlDateFormatter::FULL,
        );

        $formatter = IntlDateFormatter::create(
            $locale,
            $formatValues[$this->getDateFormat($dateFormat)],
            $formatValues[$timeFormat],
            PHP_VERSION_ID >= 50500 ? $date->getTimezone() : $date->getTimezone()->getName(),
            'gregorian' === $calendar ? IntlDateFormatter::GREGORIAN : IntlDateFormatter::TRADITIONAL,
            $format
        );

        if ($format === null && $this->showFullYear($dateFormat)) {
            // Replace yy to y (but yyy should be kept yyy, and yyyy kept as yyyy)
            // This way, years are NEVER shown as "yy" (eg. 14), but always like "yyyy" (eg. 2014)
            $pattern = preg_replace(':(^|[^y])y{2,2}([^y]|$):', '$1y$2', $formatter->getPattern());

            $formatter->setPattern($pattern);
        }

        return $formatter->format($date->getTimestamp());
    }

    /**
     * If the given date format has _year in it, true is returned, otherwise false.
     *
     * @param string $dateFormat
     * @return boolean
     */
    protected function showFullYear($dateFormat)
    {
        return (strpos($dateFormat, '_year') !== false);
    }

    /**
     * The date format will be returned without the part '_year' if it contains it.
     * @param string $dateFormat
     * @return string
     */
    protected function getDateFormat($dateFormat)
    {
        return str_replace('_year', '', $dateFormat);
    }
}

而且，当然还有app / config / config.yml中的添加

services:
    myproject.twig.extension.intl:
        class: MyprojectMyBundleTwigExtensionIntlExtension
        tags:
            - { name: twig.extension }

另一答案

试试这个：

{{ post.published_at|localizeddate('d/m/Y', 'none', locale) }}

您可以使用自己的格式使用特殊的pkaceholder，例如Y表示YYYY日期格式，检查有关localizeddate过滤器的文档。