• Introduction
• Installing/Configuring
  • Requirements
  • Installation
  • Runtime Configuration
  • Resource Types
• Predefined Constants
• APC Functions
  • apc_add — Cache a new variable in the data store
  • apc_bin_dump — Get a binary dump of the given files and user variables
  • apc_bin_dumpfile — Output a binary dump of cached files and user variables to a file
  • apc_bin_load — Load a binary dump into the APC file/user cache
  • apc_bin_loadfile — Load a binary dump from a file into the APC file/user cache
  • apc_cache_info — Retrieves cached information from APC’s data store
  • apc_cas — Updates an old value with a new value
  • apc_clear_cache — Clears the APC cache
  • apc_compile_file — Stores a file in the bytecode cache, bypassing all filters
  • apc_dec — Decrease a stored number
  • apc_define_constants — Defines a set of constants for retrieval and mass-definition
  • apc_delete_file — Deletes files from the opcode cache
  • apc_delete — Removes a stored variable from the cache
  • apc_exists — Checks if APC key exists
  • apc_fetch — Fetch a stored variable from the cache
  • apc_inc — Increase a stored number
  • apc_load_constants — Loads a set of constants from the cache
  • apc_sma_info — Retrieves APC’s Shared Memory Allocation information
  • apc_store — Cache a variable in the data store
• APCIterator — The APCIterator class
  • APCIterator::__construct — Constructs an APCIterator iterator object
  • APCIterator::current — Get current item
  • APCIterator::getTotalCount — Get total count
  • APCIterator::getTotalHits — Get total cache hits
  • APCIterator::getTotalSize — Get total cache size
  • APCIterator::key — Get iterator key
  • APCIterator::next — Move pointer to next item
  • APCIterator::rewind — Rewinds iterator
  • APCIterator::valid — Checks if current position is valid

 add a note

User Contributed Notes 2 notes

up

down

6

umut dot kirgoz at gmail dot com ¶

8 years ago

Since APC 3.1.3, there is a bug (http://pecl.php.net/bugs/bug.php?id=16814) which produces warnings like "Potential Cache Slam Averted for Key" when slam defense is on and you're trying to write a key that already exists.

These is not a fix right now for this, but you can change the APC settings from php.ini file like below if possible:

apc.write_lock = 1
apc.slam_defense = 0

up

down

1

mike at eastghost dot com ¶

7 years ago

Was using Memcache and Memcached extensions, painfully bouncing between faults, failures and shortcomings of each.  My two cents: Neither of these old drivers has been a smash hit, repressing and slowly dooming of the true potential and full use of unix memcached.

The pain finally drove to me to try APC's apc_store and apc_fetch.  The results?  Instant success, no more errors, an order of magnitude (at least) speed boost, plus one less thing (memcached) to run.  Nice.  Never going back again.  Thank y'all.