PDO stands for PHP Data Objects, and it’s a function that some website builders such as Joomla or Drupal need in order to function. Luckily, PDO is automatically active on our hosting servers. However, sometimes you will see an error that says it is missing.
Typically, this error is caused when a php.ini file is added to a folder, and essentially disables the PDO function for that folder. To fix this, all you need to do is add the following text to your php.ini file:
extension=pdo.so
extension=pdo_sqlite.so
extension=sqlite.so
extension=pdo_mysql.so
You can add this text after any other text you already have in your php.ini file, and it won’t conflict with anything else in there.