Super copied from https://github.com/vivid-planet/munin-php-apc . Better readme forthcoming.
File
http://127.0.0.1/opcache_info.php
Munin config
[php_opcache_*] user root env.url http://localhost/opcache_info.php?auto
Multigraphs
php_opcache_hit_miss
php_opcache_usage