_n( string $single, string $plural, int $number, string $domain = ‘default’ )

根据提供的数字翻译和检索单数或复数形式。
Translates and retrieves the singular or plural form based on the supplied number.

目录锚点：#说明#参数#源码#笔记

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说明（Description）

当您希望根据数字是单数还是复数来使用字符串的适当形式时使用。示例：printf（’%s person’，’%s people’，$count，’text domain’），number_format_i18n（$count））；

参数（Parameters）

源码（Source）

/**
 * Retrieve the plural or single form based on the supplied amount.
 *
 * If the text domain is not set in the $l10n list, then a comparison will be made
 * and either $plural or $single parameters returned.
 *
 * If the text domain does exist, then the parameters $single, $plural, and $number
 * will first be passed to the text domain's ngettext method. Then it will be passed
 * to the 'ngettext' filter hook along with the same parameters. The expected
 * type will be a string.
 *
 * @since 2.8.0
 *
 * @param string $single The text that will be used if $number is 1.
 * @param string $plural The text that will be used if $number is not 1.
 * @param int    $number The number to compare against to use either $single or $plural.
 * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
 * @return string Either $single or $plural translated text.
 */
function _n( $single, $plural, $number, $domain = 'default' ) {
	$translations = get_translations_for_domain( $domain );
	$translation = $translations->translate_plural( $single, $plural, $number );
	/**
	 * Filter text with its translation when plural option is available.
	 *
	 * @since 2.2.0
	 *
	 * @param string $translation Translated text.
	 * @param string $single      The text that will be used if $number is 1.
	 * @param string $plural      The text that will be used if $number is not 1.
	 * @param string $number      The number to compare against to use either $single or $plural.
	 * @param string $domain      Text domain. Unique identifier for retrieving translated strings.
	 */
	return apply_filters( 'ngettext', $translation, $single, $plural, $number, $domain );
}

笔记（Notes）

为星级插件显示“1星”或“x星”。