PDOException::could not find driver

extension = pdo_sqlite.so
extension = sqlite.so

PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20121212/pdo_sqlite.so' - /usr/lib/php5/20121212/pdo_sqlite.so: undefined symbol: php_pdo_unregister_driver in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20121212/sqlite.so' - /usr/lib/php5/20121212/sqlite.so: cannot open shared object file: No such file or directory in Unknown on line 0

cd /etc/php5/cli/conf.d
ln -s ../../mods-available/pdo.ini 10-pdo.ini

php -v
PHP 5.5.9-1ubuntu4.22 (cli) (built: Aug  4 2017 19:40:28)
Copyright (c) 1997-2014 The PHP Group
Zend Engine v2.5.0, Copyright (c) 1998-2014 Zend Technologies

/etc/php5/cli/conf.d# php -v
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20121212/pdo_pgsql.so' - /usr/lib/php5/20121212/pdo_pgsql.so: undefined symbol: pdo_parse_params in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20121212/pdo_sqlite.so' - /usr/lib/php5/20121212/pdo_sqlite.so: undefined symbol: php_pdo_unregister_driver in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20121212/pdo_odbc.so' - /usr/lib/php5/20121212/pdo_odbc.so: undefined symbol: pdo_parse_params in Unknown on line 0