Problem
You want to decrement a value in the cache.
Solution
Use Cache::decrement()
$value = Cache::decrement('key');
If the value of key is 10, then the first time this is called $value will be 9, the next call it will return 8, and so forth.
You can also pass a value to decrement.
$value = Cache::decrement('key', 50);
Discussion
Doesn't work with File or Database caches.
