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Knowledge Base

How to install/uninstall memcached PHP extension for Plesk PHP handlers

 
apachecentosdebianinstallation upgradememcached

Question

How to install/uninstall memcached PHP extension for Plesk PHP handlers?

Answer

Note: Installation of additional PHP extension is not covered by Plesk support.

  1. Connect to a Plesk server via SSH.

  2. Prepare the environment:

    • on CentOS/RHEL-based distributions:

      # wget -q -O - http://www.atomicorp.com/installers/atomic | sh && yum install make memcached gcc libmemcached-devel zlib-devel plesk-php*-devel

    • on Debian/Ubuntu-based distributions:

      # apt install memcached autoconf automake gcc libmemcached-dev libhashkit-dev pkg-config plesk-php*-dev zlib1g-dev make

      Note: For Debian 12 an additional package is needed: apt install libssl-dev

  3. Install the memcached PHP extension:

    Note: In the example below, we are installing memcached for PHP 7.4. For other PHP versions, replace 7.4 in the commands below with a required PHP version.

    # /opt/plesk/php/7.4/bin/pecl install memcached

    During the installation, additional parameters will be requested. Hit "Enter" for each option to install memcached with default options or specify required values:

    libmemcached directory [no] :
    zlib directory [no] :
    use system fastlz [no] :
    enable igbinary serializer [no] :
    enable msgpack serializer [no] :
    enable json serializer [no] :
    enable server protocol [no] :
    enable sasl [yes] :
    enable sessions [yes] :

  4. Register extension in PHP configuration file:

    # echo "extension=memcached.so" > /opt/plesk/php/7.4/etc/php.d/memcached.ini

  5. Update PHP handlers information:

    # plesk bin php_handler --reread

  6. Restart the PHP-FPM service:

    # service plesk-php74-fpm restart

  7. Restart the Apache service:

    • on CentOS/RHEL-based distributions:

      # service httpd restart

    • on Debian/Ubuntu-based distributions:

      # service apache2 restart

  8. Verify that the memcached module has been installed:

    # /opt/plesk/php/7.4/bin/php -m | grep memcached

    memcached

Uninstalling memcached extension

Note: In the example below, we are uninstalling PHP 7.4. For other PHP versions, replace 7.4 in the commands below with a required PHP version.

  1. Connect to a Plesk server via SSH.

  2. Remove the memcached configuration file:

    # rm /opt/plesk/php/7.4/etc/php.d/memcached.ini

  3. Uninstall the extension:

    # /opt/plesk/php/7.4/bin/pecl uninstall memcached

  4. Update PHP handlers information:

    # plesk bin php_handler --reread

  5. Restart the PHP-FPM service:

    # service plesk-php74-fpm restart

  6. Restart the Apache service:

    • on CentOS/RHEL-based distributions:

      # service httpd restart

    • on Debian/Ubuntu-based distributions:

      # service apache2 restart

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