我最近通过内置的更新程序将运行在ubuntu14.04.5lts上的云安装升级到了10.0.8版本。在我完成升级并尝试浏览网站后，它告诉我我的php版本至少需要更新到5.6.0版本。因此，我将我的php升级到5.6.36版本，但没有得到以下错误消息：

Exception occurred while logging exception: Failed to connect to the 

database: An exception occured in driver: could not find driver

# 0 /var/www/owncloud/lib/composer/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(992): OC\DB\Connection->connect()

# 1 /var/www/owncloud/lib/private/DB/Connection.php(210): Doctrine\DBAL\Connection->executeUpdate('PRAGMA read_unc...', Array, Array)

# 2 /var/www/owncloud/lib/composer/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(623): OC\DB\Connection->executeUpdate('PRAGMA read_unc...')

# 3 /var/www/owncloud/lib/private/DB/Connection.php(145): Doctrine\DBAL\Connection->setTransactionIsolation(2)

# 4 /var/www/owncloud/lib/composer/doctrine/dbal/lib/Doctrine/DBAL/DriverManager.php(172): OC\DB\Connection->__construct(Array, Object(Doctrine\DBAL\Driver\PDOSqlite\Driver), Object(Doctrine\DBAL\Configuration), Object(Doctrine\Common\EventManager))

# 5 /var/www/owncloud/lib/private/DB/ConnectionFactory.php(146): Doctrine\DBAL\DriverManager::getConnection(Array, Object(Doctrine\DBAL\Configuration), Object(Doctrine\Common\EventManager))

# 6 /var/www/owncloud/lib/private/Server.php(521): OC\DB\ConnectionFactory->getConnection('sqlite3', Array)

# 7 /var/www/owncloud/lib/composer/pimple/pimple/src/Pimple/Container.php(113): OC\Server->OC\{closure}(Object(OC\Server))

# 8 /var/www/owncloud/lib/private/AppFramework/Utility/SimpleContainer.php(111): Pimple\Container->offsetGet('DatabaseConnect...')

# 9 /var/www/owncloud/lib/private/ServerContainer.php(87): OC\AppFramework\Utility\SimpleContainer->query('DatabaseConnect...')

# 10 /var/www/owncloud/lib/private/Server.php(1192): OC\ServerContainer->query('DatabaseConnect...')

# 11 /var/www/owncloud/lib/private/Server.php(398): OC\Server->getDatabaseConnection()

# 12 /var/www/owncloud/lib/composer/pimple/pimple/src/Pimple/Container.php(113): OC\Server->OC\{closure}(Object(OC\Server))

# 13 /var/www/owncloud/lib/private/AppFramework/Utility/SimpleContainer.php(111): Pimple\Container->offsetGet('AppConfig')

# 14 /var/www/owncloud/lib/private/ServerContainer.php(87): OC\AppFramework\Utility\SimpleContainer->query('AppConfig')

# 15 /var/www/owncloud/lib/private/Server.php(1121): OC\ServerContainer->query('AppConfig')

# 16 /var/www/owncloud/lib/private/Server.php(575): OC\Server->getAppConfig()

# 17 /var/www/owncloud/lib/composer/pimple/pimple/src/Pimple/Container.php(113): OC\Server->OC\{closure}(Object(OC\Server))

# 18 /var/www/owncloud/lib/private/AppFramework/Utility/SimpleContainer.php(111): Pimple\Container->offsetGet('AppManager')

# 19 /var/www/owncloud/lib/private/ServerContainer.php(87): OC\AppFramework\Utility\SimpleContainer->query('AppManager')

# 20 /var/www/owncloud/lib/private/Server.php(1391): OC\ServerContainer->query('AppManager')

# 21 /var/www/owncloud/lib/private/legacy/app.php(346): OC\Server->getAppManager()

# 22 /var/www/owncloud/lib/private/legacy/app.php(110): OC_App::getEnabledApps()

# 23 /var/www/owncloud/lib/base.php(579): OC_App::loadApps(Array)

# 24 /var/www/owncloud/lib/base.php(997): OC::init()

# 25 /var/www/owncloud/index.php(54): require_once('/var/www/ownclo...')

# 26 {main}

php-m命令的输出显示如下：

[PHP Modules]
calendar
Core
ctype
date
dom
ereg
exif
fileinfo
filter
ftp
gettext
hash
iconv
json
libxml
mbstring
mcrypt
mhash
mysql
mysqli
mysqlnd
openssl
pcntl
pcre
PDO
pdo_mysql
Phar
posix
readline
Reflection
session
shmop
SimpleXML
sockets
SPL
standard
sysvmsg
sysvsem
sysvshm
tokenizer
wddx
xml
xmlreader
xmlwriter
xsl
Zend OPcache
zlib

[Zend Modules]
Zend OPcache

下面是我的config.php文件的内容：

<?php
$CONFIG = array (
  'instanceid' => 'ochvqoc7hnfv',
  'passwordsalt' => '8Nq4eSWkIepcSdmBLW8hVAyG97D3CR',
  'secret' => 'gwX4U2RzpbgIYeCcJimVRfHdck7WkfkKYCCELZioQYCWaCzM',
  'trusted_domains' =>
  array (
    0 => '192.168.20.6',
    1 => 'cloudrmsroofcom',
    2 => 'cloud.rmsroof.com',
  ),
  'datadirectory' => '/var/www/owncloud/data',
  'overwrite.cli.url' => 'http://cloud.rmsroof.com/owncloud',
  'dbtype' => 'sqlite3',
  'version' => '9.1.8.2',
  'installed' => true,
  'forcessl' => true,
  'forceSSLforSubdomains' => true,
  'ldapIgnoreNamingRules' => false,
  'loglevel' => 0,
  'maintenance' => false,
  'theme' => '',
  'trashbin_retention_obligation' => 'auto',
  'updater.secret' => '$2y$10$JgpkmF57aQX5AX0mCIYBxOjcNQJKa0hl54yRF4R9Uia6siJh5OUd2',
);

我能做些什么来解决这个问题？