You need to cache arbitrary data like results of PHP logic within methods,database query calls and generally any data results from a process (not Opcode caching).
What would you want to use between third-party caching softwares like Apc and Memcached?What makes you prefer the above tools to caching your data onto your local file system?
thanks
Luca
Go with Memcache. It has a lot more support and larger community (because it can be used by multiple languages). Supports access from multiple servers, so it allow for a more scalable architecture.
That being said, still install APC or another opcode cache for PHP. It will significantly speed up PHP’s execution time.