public function incrby($key, $increment = 1)
    {
        $this->init();
        return $this->driver->incrby($key, (int)$increment);
    }
public function incrby($key, $increment = 1)
    {
        $this->init();
        return $this->driver->incrby($key, (int)$increment);
    }
public function incrby ( $ key , $ increment = 1 ) { $ this -> init ( ) ; return $ this -> driver -> incrby ( $ key , ( int ) $ increment ) ; }
Increment the integer value of a key by the given amount
@param string $key
@param integer $increment
@return integer
Increment the integer value of a key by the given amount