Installing pdo_mysql on Amazon EC2 with PHP 5.5
Install the package php55-mysqlnd
. I believe this will provide mysql support to PDO.
Edit: For PHP 5.6 support, the package is php56-mysqlnd
.
For PHP 7.0 support, the package is php70-mysqlnd
.
For PHP 7.1 support, the package is php71-mysqlnd
.