public function closeConnection() {
		if (is_resource($this->_dbh)) {
			$res = @oci_close($this->_dbh);
			$this->checkError($res);
		}
		else {
			$res = true;
		}

		return $res;
	}
public function closeConnection() {
		if (is_resource($this->_dbh)) {
			$res = @oci_close($this->_dbh);
			$this->checkError($res);
		}
		else {
			$res = true;
		}

		return $res;
	}
public function closeConnection ( ) { if ( is_resource ( $ this -> _dbh ) ) { $ res = @ oci_close ( $ this -> _dbh ) ; $ this -> checkError ( $ res ) ; } else { $ res = true ; } return $ res ; }
Close connection and free resources
@return boolean
Close connection and free resources