private static function replaceForNativeNormalize( $string ) {
		$string = preg_replace(
			'/[\x00-\x08\x0b\x0c\x0e-\x1f]/',
			Constants::UTF8_REPLACEMENT,
			$string );
		$string = str_replace( Constants::UTF8_FFFE, Constants::UTF8_REPLACEMENT, $string );
		$string = str_replace( Constants::UTF8_FFFF, Constants::UTF8_REPLACEMENT, $string );

		return $string;
	}