Попаднах на тестов скрипт. Записва се в проекта и се стартира от PHPStorm - http://svn.symfony-project.com/branches/1.4/data/bin/check_configuration.php

 OK        PDO is installed
[[WARNING]] PDO has some drivers installed: : FAILED
            *** Install PDO drivers (mandatory for Propel and Doctrine) ***

Пак зациклих и с google .Намери се и  може де е в помощ на някого.

"If you are on windows, and your php folder is not in your PATH, you have set the absolute directory in your php.ini

for example:

extension_dir = "C:/php7/ext"

and uncomment

extension=php_mysqli.dll
extension=php_pdo_mysql.dll

Restart apache2.4 and it should work."

Резултат:OK        PDO is installed
  OK        PDO has some drivers installed: mysql

Проблем 1 е решен. Сега нова грешка:

Base table or view not found: 1146 Table 'blog.articles' doesn't exist

Изпълни

php -m|grep -i pdo

и дай резултатът

C:\Web\php>php -m|grep -i pdo
'grep' is not recognized as an internal or external command,
operable program or batch file.

C:\Web\php>php -m/grep -i pdo
[PHP Modules]
bcmath
bz2
calendar
Core
ctype
curl
date
dom
filter
hash
iconv
json
libxml
mbstring
mcrypt
mysqli
mysqlnd
pcre
PDO
pdo_mysql
Phar
Reflection
session
SimpleXML
SPL
standard
tokenizer
wddx
xdebug
xml
xmlreader
xmlwriter
zip
zlib

[Zend Modules]
Xdebug

Липсва ти articles в базата.

Провери с HeidiSQL какви таблици имаш в blog