How do I select a MySQL database to use with PDO in PHP?

Question

I want to select a MySQL database to use after a PHP PDO object has already been created. How do I do this?

// create PDO object and connect to MySQL
$dbh =         


        

Answer 1

As far as I know, you have to create a new object for each connection. You can always extend the PDO class with a method which connects to multiple databases. And then use it as you like:

public function pickDatabase($db) {
  if($db == 'main') {
    return $this->db['main']; //instance of PDO object
  else
    return $this->db['secondary']; //another instance of PDO object
}

and use it like $yourclass->pickDatabase('main')->fetchAll('your stuff');