- Plesk Onyx for Linux
Cannot install AfterLogic WebMail in Domains > example.com > Applications. The following error is shown in Plesk:
PLESK_ERROR: Error: Unable to install the app because its installation requirements are not met. Contact your hosting provider to resolve this problem.
PHP extension The 'pdo_mysql' extension was not found.
Server operating system is CloudLinux.
alt-php or LSPHP handler is used on domain in Domains > example.com > PHP Settings.
- These handlers do not show
pdo_mysqlextension as enabled in Tools & Settings > PHP Settings > handler_name or in CLI:
# /opt/alt/php56/usr/bin/php -m | grep pdo_mysql
#CLI command to check available PHP handlers:
# plesk bin php_handler --list
The chosen PHP handler has no
pdo_mysql PHP extension enabled or installed.
PHP Handlers shipped with Plesk has
pdo_mysqlextension pre-installed. Chose one of the Plesk additional PHP handlers in Domains > example.com > PHP Settings. They contain only version in the name like X.X.XX (for example 5.6.36 or 7.2.7), not alt-php or LSPHP.
If alt-php or LSPHP handler is required:
Check if the extension is installed and enable it in Tools & Settings > PHP Settings > handler_name > check the box pdo_mysql and press OK/APPLY.
If there is no such extension contact CloudLinux technical support for further assistance with the extension installation.