WP_Font_Utils::maybe_add_quotes │ private static │ WP 6.5.0

Adds surrounding quotes to font family names that contain special characters.

It follows the recommendations from the CSS Fonts Module Level 4.

Method of the class: WP_Font_Utils{}

No Hooks.

Returns

String. The font family name with surrounding quotes, if necessary.

Usage

$result = WP_Font_Utils::maybe_add_quotes( $item );

$item(string) (required)

A font family name.

Changelog

WP_Font_Utils::maybe_add_quotes() WP Font Utils::maybe add quotes code ^{WP 7.0}

private static function maybe_add_quotes( $item ) {
	// Matches strings that are not exclusively alphabetic characters or hyphens, and do not exactly follow the pattern generic(alphabetic characters or hyphens).
	$regex = '/^(?!generic\([a-zA-Z\-]+\)$)(?!^[a-zA-Z\-]+$).+/';
	$item  = trim( $item );
	if ( preg_match( $regex, $item ) ) {
		$item = trim( $item, "\"'" );
		return '"' . $item . '"';
	}
	return $item;
}