我正在一个服务器上开发一个网站，我只能访问MySQL和FTP，所以我运行的所有命令都是通过b374k php shell。我遇到了SQL驱动程序的Laravel问题。我尝试切换到文件托管的SQLite（在database/database.SQLite中），但引发的异常与使用MySQL时相同。控制台的输入输出如下：

   php artisan migrate:refresh --seed
    [Illuminate\Database\QueryException]
could not find driver (SQL: select * from sqlite_master where type = 'table ' and name = migrations)
 [Doctrine\DBAL\Driver\PDOException]
could not find driver
 [PDOException]
could not find driver

服务器上安装的Apache扩展包括：

    /etc/php/5.6/apache2/conf.d/10-mysqlnd.ini, 
/etc/php/5.6/apache2/conf.d/10-opcache.ini,
 /etc/php/5.6/apache2/conf.d/10-pdo.ini,
 /etc/php/5.6/apache2/conf.d/15-xml.ini, 
/etc/php/5.6/apache2/conf.d/20-calendar.ini,
 /etc/php/5.6/apache2/conf.d/20-ctype.ini, 
/etc/php/5.6/apache2/conf.d/20-curl.ini,
 /etc/php/5.6/apache2/conf.d/20-dom.ini, 
/etc/php/5.6/apache2/conf.d/20-exif.ini, 
/etc/php/5.6/apache2/conf.d/20-fileinfo.ini, 
/etc/php/5.6/apache2/conf.d/20-ftp.ini, /etc/php/5.6/apache2/conf.d/20-gd.ini, 
/etc/php/5.6/apache2/conf.d/20-gettext.ini, 
/etc/php/5.6/apache2/conf.d/20-iconv.ini, 
/etc/php/5.6/apache2/conf.d/20-json.ini, 
/etc/php/5.6/apache2/conf.d/20-mbstring.ini, 
/etc/php/5.6/apache2/conf.d/20-mcrypt.ini, 
/etc/php/5.6/apache2/conf.d/20-mysql.ini, 
/etc/php/5.6/apache2/conf.d/20-mysqli.ini, 
/etc/php/5.6/apache2/conf.d/20-pdo_mysql.ini,
 /etc/php/5.6/apache2/conf.d/20-phar.ini, 
/etc/php/5.6/apache2/conf.d/20-posix.ini, 
/etc/php/5.6/apache2/conf.d/20-readline.ini, 
/etc/php/5.6/apache2/conf.d/20-shmop.ini, 
/etc/php/5.6/apache2/conf.d/20-simplexml.ini, 
/etc/php/5.6/apache2/conf.d/20-sockets.ini,
 /etc/php/5.6/apache2/conf.d/20-sysvmsg.ini,
 /etc/php/5.6/apache2/conf.d/20-sysvsem.ini,
 /etc/php/5.6/apache2/conf.d/20-sysvshm.ini,
 /etc/php/5.6/apache2/conf.d/20-tokenizer.ini, 
/etc/php/5.6/apache2/conf.d/20-wddx.ini,
 /etc/php/5.6/apache2/conf.d/20-xmlreader.ini, 
/etc/php/5.6/apache2/conf.d/20-xmlwriter.ini, 
/etc/php/5.6/apache2/conf.d/20-xsl.ini, 
/etc/php/5.6/apache2/conf.d/20-zip.ini

问题可能是什么？我如何修复它？（我没有访问根bash的权限）