PHP Extensions "pdo_mysql" must be loaded

[ndecesare]

I am getting this error on the Database configuration page when installing Magento 1.7.0.2.  My PHP version is 5.5.9 and my MySQL version is 5.5.  I am fairly certain I have pdo_mysql installed, but am unable to find any kind of method to install it...I've also read it was native to my PHP version.

I have already tried the following:

• Adding ; pdo

extension=pdo.so
extension=pdo_mysql.so

to my php.ini file

• Restarting Apache2

Any additional suggestions would be greatly appreciated.

[MagenX]

you need to check php loaded modules, like:

php -m | grep -i pdo

 or just create php info page , and see everything you have there

not sure how it was installed: compiled or package manager

[bradystone]

I added these three lines to my php.ini file and it worked out for me.

extension=pdo_mysql.so
extension=pdo_mysqli.so
extension=pdo.so

[Helmuts]

thank you - worked as a charm.