public function close() {

		if(false === $this -> connection instanceof \mysqli) {
			return trigger_error('Connection already closed');
		}

		$this -> connection -> close();

		return $this;
	}
public function close() {

		if(false === $this -> connection instanceof \mysqli) {
			return trigger_error('Connection already closed');
		}

		$this -> connection -> close();

		return $this;
	}
public function close ( ) { if ( false === $ this -> connection instanceof \ mysqli ) { return trigger_error ( 'Connection already closed' ) ; } $ this -> connection -> close ( ) ; return $ this ; }
Closes the database connection
@return $this
Closes the database connection