POMO_Reader::str_split( string $string, int $chunk_size )

	function str_split($string, $chunk_size) {
		if (!function_exists('str_split')) {
			$length = $this->strlen($string);
			$out = array();
			for ($i = 0; $i < $length; $i += $chunk_size)
				$out[] = $this->substr($string, $i, $chunk_size);
			return $out;
		} else {
			return str_split( $string, $chunk_size );
		}
	}