(PHP 7)
Enumerate all assigned Unicode characters within a range
public static void IntlChar::enumCharNames ( mixed $start, mixed $limit, callable $callback [, int $nameChoice = IntlChar::UNICODE_CHAR_NAME ] )
Enumerate all assigned Unicode characters between the start and limit code points (start inclusive, limit exclusive) and call a function for each, passing the code point value and the character name.
For Unicode 1.