public function decrement($key, $offset = 1, $initial = 0, $expire = 0)
{
if ($offset <= 0 || $initial < 0) {
return false;
}
/*
* Not doing \Memcached::decrement for the reasons described in:
* @see increment()
*/
return $this->doIncrement($key, -$offset, $initial, $expire);
}