wp_has_noncharacters() │ WP 6.9.0

Returns whether the given string contains Unicode noncharacters.

XML recommends against using noncharacters and HTML forbids their use in attribute names. Unicode recommends that they not be used in open exchange of data.

Noncharacters are code points within the following ranges:

U+FDD0–U+FDEF
U+FFFE–U+FFFF
U+1FFFE, U+1FFFF, U+2FFFE, U+2FFFF, …, U+10FFFE, U+10FFFF

Хуков нет.

Возвращает

bool. Whether noncharacters were found in the string.

Использование

wp_has_noncharacters( $text ): bool;

$text(строка) (обязательный): Are there noncharacters in this string?.

Заметки

Смотрите: https://www.unicode.org/versions/Unicode17.0.0/core-spec/chapter-23/#G12612

Смотрите: https://www.w3.org/TR/xml/#charsets

Смотрите: https://html.spec.whatwg.org/#attributes-2

Список изменений

С версии 6.9.0

Введена.

Код `wp_has_noncharacters() wp has noncharacters` ^{WP 7.1.2}

wp-includes/utf8.php

function wp_has_noncharacters( string $text ): bool {
	/*
	 * Match the UTF-8 byte sequences directly so malformed UTF-8 elsewhere
	 * in the subject does not cause PCRE's Unicode mode to reject the string.
	 */
	return 1 === preg_match(
		'~
			# U+FDD0-U+FDEF, U+FFFE-U+FFFF
			\xEF(?:\xB7[\x90-\xAF]|\xBF[\xBE\xBF])
			|
			# U+nFFFE/U+nFFFF
			(?:\xF0[\x9F\xAF\xBF]|[\xF1-\xF3][\x8F\x9F\xAF\xBF]|\xF4\x8F)\xBF[\xBE\xBF]
		~x',
		$text
	);
}