I have ran into a problem attempting to install APCU for PHP5.5 My configuration is: Windows7 64-bit PHP 5.5 x86 safe-thread enabled XAMPP 3.2.1
I tried the following versions of APCU (both thread-safe and non-thread safe and for both 64 and 86): 4.0.10 4.0.8 4.0.7
The php.ini was edited like so:
extension=php_apcu.dll
apc.enabled=1
apc.shm_size=32M
apc.ttl=7200
apc.enable_cli=1
apc.serializer=php
And phpinfo doesn't show the APCU extension with any of these versions.