private function optHelp($o) {
		$o = $this->opt($o);
		if (isset($this->spec[$o][2])) {
			return $this->spec[$o][2];
		}
		return "";
	}
private function optHelp($o) {
		$o = $this->opt($o);
		if (isset($this->spec[$o][2])) {
			return $this->spec[$o][2];
		}
		return "";
	}
private function optHelp ( $ o ) { $ o = $ this -> opt ( $ o ) ; if ( isset ( $ this -> spec [ $ o ] [ 2 ] ) ) { return $ this -> spec [ $ o ] [ 2 ] ; } return "" ; }
Retrieve the help message of an option
@param string $o
@return string
Retrieve the help message of an option