public function retrieveMonth($month) {
		if (!$month) {
			return 0;
		}
		$month = mb_strtolower($month);
		if (in_array($month, $this->monthList)) {
			$keys = array_keys($this->monthList, $month);
			return $keys[0] + 1;
		}
		return 0;
	}
public function retrieveMonth($month) {
		if (!$month) {
			return 0;
		}
		$month = mb_strtolower($month);
		if (in_array($month, $this->monthList)) {
			$keys = array_keys($this->monthList, $month);
			return $keys[0] + 1;
		}
		return 0;
	}
public function retrieveMonth ( $ month ) { if ( ! $ month ) { return 0 ; } $ month = mb_strtolower ( $ month ) ; if ( in_array ( $ month , $ this -> monthList ) ) { $ keys = array_keys ( $ this -> monthList , $ month ) ; return $ keys [ 0 ] + 1 ; } return 0 ; }
Month as integer value 1..12 or 0 on error
february => 2

@param string $month
@return int
Month as integer value 1 .. 12 or 0 on error february = > 2