The PDO extension is required for this adapter but the extension is not loaded Magento

Generally people getting below error after making php.ini file at magento root folder.

"The PDO extension is required for this adapter but the extension is not loaded";i:1;s:2191:"#0 /home/aakrutiw/public_html/mangonis.com/lib/Zend/Db/Adapter/Abstract.php(248);

Kindly add the following in php.ini file which is located in magento root folder

extension=pdo.so;
extension=pdo_sqlite.so;
extension=sqlite.so;

extension=pdo_mysql.so;