src/Services/Database.php
protected function createPDO($dsn, $username, $password, array $options)
    {
        return new PDO($dsn, $username, $password, $options);
    }
protected function createPDO($dsn, $username, $password, array $options)
    {
        return new PDO($dsn, $username, $password, $options);
    }
protected function createPDO ( $ dsn , $ username , $ password , array $ options ) { return new PDO ( $ dsn , $ username , $ password , $ options ) ; }
Create a new PDO instance.

This method creates the internal PDO instance.
@see http://php.net/manual/en/pdo.construct.php

@param string $dsn
@param string $username
@param string $password
@param array $options
@return PDO
Create a new PDO instance .