APC User Cache
- apcu_add - Cache a new variable in the data store
- apcu_cache_info - Retrieves cached information from APCu's data store
- apcu_cas - Updates an old value with a new value
- apcu_clear_cache - Clears the APCu cache
- apcu_dec - Decrease a stored number
- apcu_delete - Removes a stored variable from the cache
- apcu_enabled - Whether APCu is usable in the current environment
- apcu_entry - Atomically fetch or generate a cache entry
- apcu_exists - Checks if entry exists
- apcu_fetch - Fetch a stored variable from the cache
- apcu_inc - Increase a stored number
- apcu_key_info - Get detailed information about the cache key
- apcu_sma_info - Retrieves APCu Shared Memory Allocation information
- apcu_store - Cache a variable in the data store