_wp_has_noncharacters_fallback()

_wp_has_noncharacters_fallback( string $text ): bool

function _wp_has_noncharacters_fallback( string $text ): bool {
	$at                = 0;
	$invalid_length    = 0;
	$has_noncharacters = false;
	$end               = strlen( $text );

	while ( $at < $end && ! $has_noncharacters ) {
		_wp_scan_utf8( $text, $at, $invalid_length, null, null, $has_noncharacters );
		$at += $invalid_length;
	}

	return $has_noncharacters;
}