You can find this file using find:
find / -name apc.php
On my VPS, it shows up in the following:
/build/buildd/php5-5.3.2/pear-build-download/APC-3.1.6/apc.php /usr/share/php/apc.php
You can find this file using find:
find / -name apc.php
On my VPS, it shows up in the following:
/build/buildd/php5-5.3.2/pear-build-download/APC-3.1.6/apc.php /usr/share/php/apc.php