JpnForPhp\Transliterator\Romaji::transliterateDefaultCharacters PHP Method

Use the specified mapping to transliterate the given string into romaji

protected transliterateDefaultCharacters ( string $str, array $parameters ) : string
$str	string	String to be converted.
$parameters	array	Characters mapping.
return	string	Converted string.

    protected function transliterateDefaultCharacters($str, $parameters)
    {
        return strtr($str, $parameters['mapping']);
    }

Romaji