https://www.php.net/apcu_sma_info
Retrieves APCu Shared Memory Allocation information
phpapcusmainfomanual
https://www.php.net/manual/en/function.apcu-dec.php
Decrease a stored number
phpapcudecmanual
https://www.php.net/manual/zh/function.apcu-entry.php
Atomically fetch or generate a cache entry
phpapcuentrymanual
https://launchpad.net/ubuntu/+source/php-apcu/5.1.21+4.0.11-7ubuntu1
phpapcupackage