public static function connect($credentials, $allow_missing_db = NULL)
{
if (self::$instance === NULL) {
self::$instance = new Plusql();
}
if (!isset(self::$instance->credentials[$credentials])) {
throw new InvalidCredentialsException('Unable to begin Plusql session with credentials named: ' . $credentials . ' (cos they don\'t exist)');
}
$host = self::$instance->credentials[$credentials][0];
$user = self::$instance->credentials[$credentials][1];
$password = self::$instance->credentials[$credentials][2];
$dbname = self::$instance->credentials[$credentials][3];
$key = implode('-', self::$instance->credentials[$credentials]);
if (!isset(self::$instance->connections[$key])) {
$conn = new PluSQL\Connection($host, $user, $password, $dbname);
self::$instance->connections[$key] = $conn;
} else {
$conn = self::$instance->connections[$key];
}
try {
$conn->connect();
} catch (Exception $exc) {
if ($allow_missing_db != self::ALLOW_MISSING_DB) {
throw $exc;
}
}
return $conn;
}
