Alternative PHP Cache
APCu - APC User Cache
APCu Backwards Compatibility Module
A fast database for constant data with memory sharing across processes
Constants for real
immutable_cache - an shared memory cache of immutable values
memcached extension
PHP extension for interfacing with memcached via libmemcached library
Transparently cache PHP functions
Varnish Cache bindings
Windows Cache Extension for PHP
lockless user data cache
The Zend OPcache provides faster PHP execution through opcode caching and optimization.