APC (Alternative PHP Caching http://us.php.net/manual/en/book.apc.php) is a memory based opcode caching system which supports variable caching inside of php scripts. It’s among 3 major opcode cachers for PHP (the other two are XCache and EAccelerator). While APC sounds great (after all, to install it all you need to type is `pecl install apc`), it suffers from a …
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