CI_Cache::decrement PHP Method

Decrement a raw value

public decrement ( string $id, integer $offset = 1 ) : mixed
$id	string	Cache ID
$offset	integer	Step/value to reduce by
return	mixed	New value on success or FALSE on failure

    public function decrement($id, $offset = 1)
    {
        return $this->{$this->_adapter}->decrement($this->key_prefix . $id, $offset);
    }

CI_Cache