How to install APCu module on Plesk server ?

Connect to the server via SSH.

Install required development packages:

• For .deb-based OS (Ubuntu, Debian):

  # apt install plesk-php70-dev zlib1g-dev gcc

• For .rpm-based OS (CentOS, RHEL, CloudLinux):

  # yum install plesk-php70-devel zlib-devel gcc

Note: As an example, Plesk PHP 7.0 development package is installed. For a different version of PHP change php70 to the required version, for instance, php56

Install APCu module:

• For Plesk PHP 7.x:

  # /opt/plesk/php/7.x/bin/pecl install apcu

• For Plesk PHP 5.x:

  # /opt/plesk/php/5.x/bin/pecl install apcu-4.0.11

Enable APCu in PHP configuration:

# echo "extension=apcu.so" > /opt/plesk/php/7.0/etc/php.d/apcu.ini

Restart PHP service and refresh PHP handlers information:

# service plesk-php70-fpm restart

# plesk bin php_handler --reread

Verify that the module is loaded and is working:

# /opt/plesk/php/7.0/bin/php -i | grep apc.enabled
apc.enabled => On => On