How To Check What PHP Version Roundcube Is Using?
Procedure
The following command will give you the symbolic link to the main php.ini file and the PHP version that Roundcube is using:
ls -Flathr /usr/local/cpanel/3rdparty/etc/roundcube/php.ini
lrwxrwxrwx 1 root root 55 Mar 14 18:06 /usr/local/cpanel/3rdparty/etc/roundcube/php.ini -> /usr/local/cpanel/3rdparty/php/74/etc/roundcube/php.ini