User Cache


APCu Version Information

You are running an older version of APCu (4.0.2), newer version 5.1.19 is available at

Change Log:

APCu 5.1.19

- Fixed apcu_store() with integer keys (#388).
- Made apc.use_request_time=0 the default (#391).
- Made apcu compatible with PHP 8.0.
APCu 5.1.18

- Implement apcu_inc() and apcu_dec() using atomic operations. This means that these functions no longer have to acquire a write lock. These functions will now wraparound on overflow, instead of saturating to a floating point value.
- Make table header in apc.php sticky.
- Fix compile warnings related to mktemp() usage.
- Fix compatibility with PHP 8.0.
- Fix required number of arguments for apcu_store() returned by Reflection.
APCu 5.1.17

- Fixed compatibility with PHP 7.4 and PHP 8.0.
APCu 5.1.16

- Fix build on OSX.
APCu 5.1.15

- Restore apc.serializer=php as the default, as the "default" serializer still/again has issues.
- Fix possible issues in persistence of arrays with the "default" serializer.
- Attempt to reduce shared memory fragementation.
APCu 5.1.14

- Fixed GH #347: Disable slam defense by default.
- Fix potential issue with destruction of locks. This does not affect Linux, but might affect Windows and BSD.
- Use mutex instead of rwlock for shared memory allocator (if pthreads mutex available).
- Require only read-lock for apcu_cas(), by using atomic compare-and-swap.
APCu 5.1.13

- Reimplement persistence logic using precise allocation rather than memory pools. This reduces
memory usage of cache entries, especially for small values, and improves performance of persisting
and unpersisting values.
- Fixed GH #335: Stampede protection is broken.
- Fixed GH #328: Segfault in apcu_key_info() if APCu is disabled.
- Generally make the behavior of functions if APCu is disabled more consistent.
- Fixed PHP bug #72980: Empty strings are now consistently allowed as cache keys.
- Optimized apcu_key_info() and apcu_cache_info() by using interned strings.
- Fix build against PHP master (PHP 7.4).
- Many changes to internal C APIs.
APCu 5.1.12

- gh#307: Fix 'Timout' sort option (apc.php).
- gh#308: Keep search parameter on cache entry detail link (apc.php).
- Fix --enable-apcu-clear-signal support.
- Show entries with expired global TTL in APCuIterator.
- Respect TTL when calculating APCuIterator totals.
- The per-entry TTL now always takes precedence over the global TTL.
- The global TTL is now always relative to the access time.
- apcu_inc() and apcu_dec() no longer update hard-expired entries. Instead a new entry is created.
- Added optional $ttl argument to apcu_inc() and apcu_dec(), used when creating a new entry.
- PHP bug #76145: Fix use of APCu inside Serializer::(un)serialize().
- gh#304: If apcu_cas() is used on a non-existing entry, don't insert it.
- gh#295: Improve APCuIterator performance by using PCRE JIT and preallocating key strings.
- Reduce the memory overhead of cache entries.
- Prevent potential memory corruption in the cache slam defense implementation.
- Ensure cache entry references are released on bailout during unserialization.
- Make support for atomic operations a hard requirement for building APCu.
- Check write-lock acquisition for failure, to help debugging deadlock situations.
- Make sure apcu_inc/dec are atomic when working on a non-existing entry.
- Many changes to internal C APIs.
APCu 5.1.11

- fix gh#246 apcu_entry hangs
- fix gh#259 deadlock in apcu_store
- fix gh#281 undefined variable in apc.php
- fix handling of fatal errors in apcu_entry
- check string lengths when looking up keys
- many internal C APIs changed
APCu 5.1.10

- fix gh#247 when a NUL char is used as key, apcu_fetch(array) truncates the key
- fix gh#248 apcu_fetch may return values causing zend_mm_corruption or segfaults
when custom serializer is used
- fix gh#260 apcu.serializer=default results in segfault
- fix gh#274 non-portable shell == in config.m4
- fix crash when passing bad array to apcu_delete
- improve fix gh#266 refcounting errors in APCIterator
- fix for PHP 7.3 compatibility