(PECL memcached >= 0.1.0)
Decrement numeric item's value
public int Memcached::decrement ( string $key [, int $offset = 1 [, int $initial_value = 0 [, int $expiry = 0 ]]] )
Memcached::decrement() decrements a numeric item's value by the specified offset. If the item's value is not numeric, an error will result. If the operation would decrease the value below 0, the new value will be 0. Memcached::decrement() will set t