function offsetExists($key) {
		$this->access($key);
		$return = array_key_exists($key, $this->row);
		if (!$return) {
			$this->access($key, true);
		}
		return $return;
	}
function offsetExists($key) {
		$this->access($key);
		$return = array_key_exists($key, $this->row);
		if (!$return) {
			$this->access($key, true);
		}
		return $return;
	}
function offsetExists ( $ key ) { $ this -> access ( $ key ) ; $ return = array_key_exists ( $ key , $ this -> row ) ; if ( ! $ return ) { $ this -> access ( $ key , true ) ; } return $ return ; }
Test if column exists
@param string column name
@return bool
Test if column exists