LinuxHostingSupport

For a plain Linux server, follow: How to install APC cache on a Linux server?

Installation of APC cache on a cPanel server is pretty easy. Follow the below steps to install APC cache on cPanel server:

1. SSH to the server and execute:

# yum install pcre-devel

2. Goto WHM –> PHP Configuration Editor –> Advanced Mode, change the  “extension_dir” value from

/usr/local/lib/php/extensions/no-debug-non-zts-20060613
to
/usr/lib/php/extensions/no-debug-non-zts-20060613

3. Install APC cache from WHM.

WHM --> Module Installers --> click Manage next to "PHP Pecl".
Search APC and install it.

4. Change PHP Handler to DSO. You can either do this from WHM OR via SSH:

WHM --> Service Configuration --> Apache Configuration -->
Configure PHP and SuExec --> PHP5 Handler
OR
# /usr/local/cpanel/bin/rebuild_phpconf 5 0 dso 1

Once done, make sure apc.so file is present in the /usr/lib/php/extensions/no-debug-non-zts-20060613 directory. Sometimes it is created in the original directory and you have to create a symlink.

# ln -s /usr/local/lib/php/extensions/no-debug-non-zts-20060613/apc.so \
 /usr/lib/php/extensions/no-debug-non-zts-20060613/apc.so

Restart the Apache webserver and to confirm if APC is activated, execute:

# php -i | grep apc