public function pop()
    {
        $etime = microtime(true);

        if (! ($this->_idx > 0)) {
            throw new Exception('No timers have been started');
        }

        return $etime - $this->_start[--$this->_idx];
    }
public function pop()
    {
        $etime = microtime(true);

        if (! ($this->_idx > 0)) {
            throw new Exception('No timers have been started');
        }

        return $etime - $this->_start[--$this->_idx];
    }
public function pop ( ) { $ etime = microtime ( true ) ; if ( ! ( $ this -> _idx > 0 ) ) { throw new Exception ( 'No timers have been started' ) ; } return $ etime - $ this -> _start [ -- $ this -> _idx ] ; }
Pop the latest timer start and return the difference with the current
time.

@return float The amount of time passed.
Pop the latest timer start and return the difference with the current time .